Amino Acids

<p>Nonstandard amino acids</p> Signup and view all the answers

<p>Histamine</p> Signup and view all the answers

<p>Essential amino acids are 10 in number and cannot be synthesized in the body, so they must be obtained from the diet. Their deficiency can affect growth, health, and protein synthesis.</p> Signup and view all the answers

<p>Semi-essential amino acids are formed in the body but not in sufficient amounts for body requirements, especially in children. Examples include arginine and histidine.</p> Signup and view all the answers

<p>Non-essential amino acids can be synthesized in the body, unlike essential and semi-essential amino acids.</p> Signup and view all the answers

<p>Nonstandard amino acids occur naturally in cells but do not participate in peptide synthesis. Many are metabolic intermediates, such as ornithine and citrulline, which are intermediates in urea biosynthesis.</p> Signup and view all the answers

<p>Amino acid derivatives are chemical derivatives of amino acids with important biological functions. Examples include catecholamines, GABA, dopamine, and histamine, which act as neurotransmitters and mediate parts of the immune response.</p> Signup and view all the answers