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Questions and Answers
Which isoenzyme of alkaline phosphatase is the most heat stable?
Which isoenzyme of alkaline phosphatase is the most heat stable?
- Intestinal
- Bone
- Placental (correct)
- Hepatic
In electrophoresis, which alkaline phosphatase isoenzyme exhibits the fastest mobility towards the anode?
In electrophoresis, which alkaline phosphatase isoenzyme exhibits the fastest mobility towards the anode?
- Bone
- Placental
- Intestinal
- Liver (correct)
Which of the following best describes the heat stability characteristic of the bone isoenzyme of alkaline phosphatase?
Which of the following best describes the heat stability characteristic of the bone isoenzyme of alkaline phosphatase?
- Intermediate labile: disappears at 56°C
- Stable at 56°C for 30 minutes
- Labile: disappears at 56°C (correct)
- Stable at 65°C for 30 minutes
What is a characteristic of Regan isoenzyme?
What is a characteristic of Regan isoenzyme?
To improve the separation of liver and bone isoenzymes during electrophoresis, which substance can be added?
To improve the separation of liver and bone isoenzymes during electrophoresis, which substance can be added?
What is the characteristic of the intestinal alkaline phosphatase isoenzyme in terms of heat stability?
What is the characteristic of the intestinal alkaline phosphatase isoenzyme in terms of heat stability?
In electrophoresis, which of these alkaline phosphatase isoenzymes demonstrates the slowest mobility?
In electrophoresis, which of these alkaline phosphatase isoenzymes demonstrates the slowest mobility?
What is a common source of carciono-isoenzymes?
What is a common source of carciono-isoenzymes?
Which isoenzyme of alkaline phosphatase demonstrates the greatest heat stability, being able to withstand denaturation at 65°C for up to 30 minutes?
Which isoenzyme of alkaline phosphatase demonstrates the greatest heat stability, being able to withstand denaturation at 65°C for up to 30 minutes?
During electrophoresis, which alkaline phosphatase isoenzyme migrates most anodically?
During electrophoresis, which alkaline phosphatase isoenzyme migrates most anodically?
Which of the following isoenzymes demonstrates the most heat labile property?
Which of the following isoenzymes demonstrates the most heat labile property?
What is the effect of phenylalanine on the activity of alkaline phosphatase isoenzymes?
What is the effect of phenylalanine on the activity of alkaline phosphatase isoenzymes?
Which of the following is true regarding the activity of alkaline phosphatase isoenzymes in the presence of urea?
Which of the following is true regarding the activity of alkaline phosphatase isoenzymes in the presence of urea?
In an alkaline phosphatase heat fractionation test, after 10 minutes at 56°C, which isoenzyme would show the highest relative activity?
In an alkaline phosphatase heat fractionation test, after 10 minutes at 56°C, which isoenzyme would show the highest relative activity?
Which specific isoenzymes are directly inhibited by L-phenylalanine?
Which specific isoenzymes are directly inhibited by L-phenylalanine?
If an electrophoretic test is performed on a sample containing different alkaline phosphatase isoenzymes, which isoenzyme would migrate closest to the cathode?
If an electrophoretic test is performed on a sample containing different alkaline phosphatase isoenzymes, which isoenzyme would migrate closest to the cathode?
In the reaction involving pyruvate and DNPH, which condition is required?
In the reaction involving pyruvate and DNPH, which condition is required?
What is the relationship between the activity of the colored complex and ALT activity?
What is the relationship between the activity of the colored complex and ALT activity?
At which wavelength is the change in absorbance of the colored complex measured?
At which wavelength is the change in absorbance of the colored complex measured?
Which chemical compound is used for color development in the reactions described?
Which chemical compound is used for color development in the reactions described?
What is the primary category of enzymes to which ALP belongs?
What is the primary category of enzymes to which ALP belongs?
Which of the following is a major organ primarily associated with AST/SGOT?
Which of the following is a major organ primarily associated with AST/SGOT?
Which organ is ALT considered to be highly specific for?
Which organ is ALT considered to be highly specific for?
Which of the following is NOT a specific disorder associated with ALP?
Which of the following is NOT a specific disorder associated with ALP?
What is the main role of NaOH in the described methods?
What is the main role of NaOH in the described methods?
What is the main purpose of using Reitman and Frankel method?
What is the main purpose of using Reitman and Frankel method?
In which condition will G-6-PD levels decrease?
In which condition will G-6-PD levels decrease?
Which tissue does NOT contain G-6-PD?
Which tissue does NOT contain G-6-PD?
What is the primary function of angiotensin-converting enzyme (ACE)?
What is the primary function of angiotensin-converting enzyme (ACE)?
A deficiency in G-6-PD will most likely lead to which condition?
A deficiency in G-6-PD will most likely lead to which condition?
What is a diagnostic significance of ACE?
What is a diagnostic significance of ACE?
Which marker is significant for detecting prostate cancer?
Which marker is significant for detecting prostate cancer?
What role does alkaline phosphatase (ALP) play in differentiating liver and bone problems?
What role does alkaline phosphatase (ALP) play in differentiating liver and bone problems?
Which band of alkaline phosphatase isoenzymes is associated with prostatic tissue?
Which band of alkaline phosphatase isoenzymes is associated with prostatic tissue?
In cholestatic disorders, which substance is expected to increase?
In cholestatic disorders, which substance is expected to increase?
What is the typical reference value range for alkaline phosphatase?
What is the typical reference value range for alkaline phosphatase?
Which isoenzyme band is primarily found in white blood cells (granulocytes)?
Which isoenzyme band is primarily found in white blood cells (granulocytes)?
What happens to ACP levels in cases of thrombocytopenia?
What happens to ACP levels in cases of thrombocytopenia?
Which method was NOT mentioned for the diagnostic evaluation of alkaline phosphatase isoenzymes?
Which method was NOT mentioned for the diagnostic evaluation of alkaline phosphatase isoenzymes?
What is the significance of GGT elevation in patients with acute pancreatitis?
What is the significance of GGT elevation in patients with acute pancreatitis?
Which of the following drugs is known to induce enzyme activity, leading to an increase in GGT levels?
Which of the following drugs is known to induce enzyme activity, leading to an increase in GGT levels?
Why is placental ALP considered a good tumor marker for germ cell tumors?
Why is placental ALP considered a good tumor marker for germ cell tumors?
What role does phosphorus play in the testing process of ALP levels?
What role does phosphorus play in the testing process of ALP levels?
In which cellular structure is GGT primarily located?
In which cellular structure is GGT primarily located?
What happens to GGT levels in a patient diagnosed with diabetes mellitus?
What happens to GGT levels in a patient diagnosed with diabetes mellitus?
Which of the following methods can be used to determine GGT activity?
Which of the following methods can be used to determine GGT activity?
What is the substrate used in the determination of GGT levels?
What is the substrate used in the determination of GGT levels?
Flashcards
Alanine Aminotransferase (ALT)
Alanine Aminotransferase (ALT)
An enzyme involved in the breakdown of amino acids, specifically converting alanine to pyruvate.
ALT Isoenzyme for Bone
ALT Isoenzyme for Bone
A liver-specific enzyme that can also be found in bone.
Aspartate Aminotransferase (AST)
Aspartate Aminotransferase (AST)
An enzyme primarily found in the heart and liver, but also present in other tissues.
AST Isoenzyme for Heart
AST Isoenzyme for Heart
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Alkaline Phosphatase (ALP)
Alkaline Phosphatase (ALP)
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ALP Isoenzyme for Liver
ALP Isoenzyme for Liver
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Colorimetric Reaction
Colorimetric Reaction
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Color Intensifier
Color Intensifier
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Color Developer
Color Developer
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Reitman and Frankel Method
Reitman and Frankel Method
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Alkaline Phosphatase
Alkaline Phosphatase
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Isoenzymes
Isoenzymes
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CarcinoPlacental Isoenzyme
CarcinoPlacental Isoenzyme
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Electrophoresis
Electrophoresis
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Mobility (Electrophoresis)
Mobility (Electrophoresis)
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Electrophoretic Mobility of Alkaline Phosphatase Isoenzymes
Electrophoretic Mobility of Alkaline Phosphatase Isoenzymes
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Lectin (Electrophoresis)
Lectin (Electrophoresis)
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Neuraminidase (Electrophoresis)
Neuraminidase (Electrophoresis)
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Heat Fractionation/Stability Test
Heat Fractionation/Stability Test
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Placental Alkaline Phosphatase
Placental Alkaline Phosphatase
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Intestinal Alkaline Phosphatase
Intestinal Alkaline Phosphatase
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Bone Alkaline Phosphatase
Bone Alkaline Phosphatase
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Chemical Inhibition Test
Chemical Inhibition Test
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Phenylalanine
Phenylalanine
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Synthetic Urea
Synthetic Urea
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What is G-6-PD?
What is G-6-PD?
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What happens when G-6-PD is deficient?
What happens when G-6-PD is deficient?
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Where's G-6-PD found?
Where's G-6-PD found?
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What is ACE (Angiotensin-Converting Enzyme)?
What is ACE (Angiotensin-Converting Enzyme)?
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What is the diagnostic significance of ACE?
What is the diagnostic significance of ACE?
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GGT (Gamma-Glutamyl Transferase)
GGT (Gamma-Glutamyl Transferase)
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Elevated GGT Not Indicating Liver Damage
Elevated GGT Not Indicating Liver Damage
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GGT in Pancreatitis
GGT in Pancreatitis
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Substrate
Substrate
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ALP Inhibition by Phosphorus
ALP Inhibition by Phosphorus
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Placental ALP
Placental ALP
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Placental ALP as a Tumor Marker
Placental ALP as a Tumor Marker
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What is 5' Nucleotidase (5'N) and why is it important?
What is 5' Nucleotidase (5'N) and why is it important?
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When does 5'N increase?
When does 5'N increase?
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Where is Acid Phosphatase (ACP) found?
Where is Acid Phosphatase (ACP) found?
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What are the applications of Acid Phosphatase (ACP)?
What are the applications of Acid Phosphatase (ACP)?
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How is Acid Phosphatase (ACP) fractioned?
How is Acid Phosphatase (ACP) fractioned?
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Where is ACP Band 1 (B1) found?
Where is ACP Band 1 (B1) found?
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Where is ACP Band 2 (B2) found?
Where is ACP Band 2 (B2) found?
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Where is ACP Band 3 (B3) found and what implication does it have?
Where is ACP Band 3 (B3) found and what implication does it have?
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Study Notes
Liver Enzymes
- Liver function tests measure the liver's ability to synthesize proteins and the detoxification of substances.
- Bilirubin and urobilinogen excretion are measured to assess liver's ability to perform these tasks accurately.
- Elevated ammonia levels indicate liver damage or dysfunction.
- Urea conversion from ammonia neutralizes its toxicity.
- Urea is easily excreted through the kidneys, eliminating its toxicity.
- Liver enzymes are released during liver damage or injury to the liver.
- Liver damage is identifiable by increased liver enzymes in the blood, indicating cytolysis and necrosis.
- Differentiating hepatocellular (liver cell) and obstructive (blockages) liver diseases is essential.
- ALT and AST are common liver enzymes used to assess damage to the liver.
- GGT (gamma-glutamyl transferase) and LDH (lactate dehydrogenase) are additional liver enzymes.
- Hepatocellular problems result in increased liver enzymes.
- Obstructive disorders may cause minor increases in liver enzymes.
Liver Function Tests (LFTs)
- Alanine aminotransferase (ALT) and aspartate aminotransferase (AST) are used to assess liver damage.
- Alkaline phosphatase (ALP) is another enzymatic factor used for liver function assessment.
Enzyme Tests
- ALP (alkaline phosphatase) tests for damage to liver cells and bile ducts.
- AST (aspartate aminotransferase) assesses damage related to liver cell damage.
- ALT (alanine aminotransferase) tests for liver damage, particularly in conditions affecting liver cells.
- Common liver enzymes provide insights into liver damage and are helpful in obstructive diseases for diagnosis.
- GGT (gamma-glutamyl transferase) tests for liver and bile duct damage.
- LD (lactate dehydrogenase). LDH can assist in the detection of liver diseases, but is also found in other tissues.
Liver Function and Disease
- Liver is a key metabolic organ, performing various functions like storage and synthesis.
- Liver produces various proteins and enzymes, storing important nutrients.
Hepatocellular Function
- Hepatocytes (liver cells) are crucial for liver function.
- Hepatocellular disorders indicate damage to the liver cells, causing a range of problems.
- The synthesis of clotting factors by the liver is assessed through tests like prothrombin time (PT) and clotting factors.
Liver Disorder Evaluation
- Obstructive jaundice differs from hepatocellular diseases (e.g., hepatitis).
- Elevated ALT and AST are found in hepatocellular disorders.
- Normal or slightly elevated ALT and AST may be observed in obstructive conditions.
- Liver function tests such as ALT, AST, and ALP may indicate dysfunction and potential problems, depending on the results.
Obstructive and Hepatocellular Disorders
- Obstructive jaundice relates to blockages in the bile ducts.
- Hepatocellular disorders indicate damage to the liver cells.
Liver Enzyme Isoenzymes
- Liver enzymes have different forms (isoenzymes) that are specific to the liver and other tissues.
- Liver isoenzymes are detected by electrophoresis and other methods.
- Different isoenzymes are helpful in determining the location of damage or disease within the liver or other tissues.
- Blood tests for certain isoenzymes are useful in diagnosing the specific organ affected by disease or damage.
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