How are proteins digested? (5)

Proteases are secreted as inactive precursors (zymogens) so that they don't digest the cells that made them Proteases can be activated with specific enzymes or chemical agents(low pH = acidic conditions) Starts in stomach and continues in small intestine pepsin: made and used in stomach (pepsinogen), activated by hydrochloric acid trypsin: made in pancreas (trypsinogen), activated by enterokinase in the intestine