1. Amino acids are present in the proteins of bone tissue, their radicals contain one or even two carboxyl groups. Name these amino acids, draw their formulas and answer the following questions: a) what radical is formed from an amino acid after incorporation of the latter into a polypeptide chain? b) which of these amino acids can bind more cal- cium ions (Ca^2+) while forming the bone tissue? c) what kind of bond is formed between the radi- cals of amino acid and Ca^2+

Question

1. Amino acids are present in the proteins of bone tissue, their radicals contain one or even two carboxyl groups. Name these amino acids, draw their formulas and answer the following questions: a) what radical is formed from an amino acid after incorporation of the latter into a polypeptide chain? b) which of these amino acids can bind more cal- cium ions (Ca^2+) while forming the bone tissue? c) what kind of bond is formed between the radi- cals of amino acid and Ca^2+

Answer 1

a) After an amino acid is incorporated into a polypeptide chain, the radical formed is called a "peptide" or "amino acid residue". The general formula for a peptide bond is -CO-NH-.b) The amino acids that can bind more calcium ions (Ca2+) while forming bone tissue are those with multiple carboxyl groups in their side chains. These include aspartic acid and glutamic acid.c) The bond formed between the radicals of amino acids and Ca2+ is an ionic bond.

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