NUTR 3210 Final: FINAL exam review
3 Feb 2019
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Document Summary
Dietary protein is absorbed and digested as aas which can become: structural proteins (muscle, connective, regulatory proteins (enzymes, hormones, transport proteins (haemoglobin, albumin) Into nh3 (ammonia) and nh4 (ammonium) for use in the urea cycle. 20 classified as standard: encoded directly into eukaryote genome, not selenocysteine. Usually formed post-translational modification of other aas. Or as intermediates in the metabolic pathways of standard aas. Won"t talk about them much rarely used to make proteins. All standard aas exist as enantiomers (mirror image) except. Connected by peptide bonds (amide bonds c-n) Carboxyl group releases water when it joins with an nh2 (condensation) Proteins are chains of peptides (a polypeptide) Several join until they form a linear polypeptide chain. When 1 or more polypeptides join, they make a 3-d folded protein (biologically active) All aa held together by peptide bonds. Has a carboxyl and amino end, start counting at amino end. Determined by hydrogen bonds that form a stabilized structure (certain.
