MICROANATOMY

Detailed explanation-1: -The several proteolytic enzymes present in the GIT include endopeptidases (trypsin, chymotrypsin, and elastase) and exopeptidases (carboxypeptidase A and aminopeptidase). These proteolytic enzymes are regarded as extracellular barriers and are involved in the degradation of peptides and proteins.

Detailed explanation-2: -Trypsin elastase, carboxypeptidase, and chymotrypsin are produced by the pancreas and released into the duodenum where they act on the chyme. Further breakdown of peptides to single amino acids is aided by enzymes called peptidases (those that break down peptides).

Detailed explanation-3: -Trypsin cleaves the peptide bond between the carboxyl group of arginine or the carboxyl group of lysine and the amino group of the adjacent amino acid. The rate of cleavage occurs more slowly when the lysine and arginine residues are adjacent to acidic amino acids in the sequence or cystine.