THORAX ABDOMEN AND PELVIS

Detailed explanation-1: -Mold kinase transforms trypsinogen to trypsin only in an acid medium. It differs thus from enterokinase and trypsin which activate trypsinogen best in a slightly alkaline medium.

Detailed explanation-2: -Once trypsinogen is released into the lumen of the small intestine, enterokinase produced by the duodenal mucosa converts trypsinogen into an active form, trypsin.

Detailed explanation-3: -Enterokinase is a protease of the intestinal brush border that specifically cleaves the acidic propeptide from trypsinogen to yield active trypsin. This cleavage initiates a cascade of proteolytic reactions leading to the activation of many pancreatic zymogens.