Lysine has a positively charged side chain and its pK values are 2.18 (pK1), 8.95 (pK2), and 10.53 (pKR). Which one of the following sentences is correct?
Understand the Problem
The question is asking about the properties of lysine, specifically related to its charged side chain and isoelectric point. It provides multiple choices and requests to identify the correct statement regarding lysine based on the given pK values.
Answer
Its isoelectric point (pI) is 9.74.
The isoelectric point (pI) of lysine is 9.74.
Answer for screen readers
The isoelectric point (pI) of lysine is 9.74.
More Information
The isoelectric point (pI) is the pH at which the amino acid has no net charge, balancing positive and negative charges.
Tips
A common mistake is using the wrong pKa values to calculate the pI. For amino acids with ionizable side chains, ensure you select the correct values.
Sources
- Find the isoelectric point pI of Lysine - Vedantu - vedantu.com
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