Dietary Proteins

on 5.9.08 with 0 comments



Animal protein gives all 9 essential protein except gelatin

Plant protein do not contain all 9 except the soy bean which does


Typically what happens with various foods when eating you are compensating for other foods that are deficient in another amino acid.


Protein digestion begins in the stomach and is degraded by pepsin

Pepsinogen activated by HCL (released by parietal cells along with intrinsic factor)

Gastrin controls pepsinogen (chief cells) and HCL

Chyme this is created with enzymes and protein breaking down in stomach


CCK released in SI and triggers additional enzymes

Trypsin – reduces peptides into individual amino acids

Chymotrypsin

Carboxypeptidase


Absorption peptides and AA are absorbed in the SI by ACTIVE absorption. As an adult we do not absorb whole proteins. However, infants can absorb a whole protein molecule. The small absorbed pepetides are digested to smaller peptides and are carried to the hepatic portal vein and are the stored or produced into glucose or fat,

Category: Biochemistry Notes

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