ANSC 2120 Lecture Notes - Lecture 18: Amphoterism, Elastin, Autocrine Signalling
29 Feb 2016
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0. 0-1. 5: note: average n content for most proteins is assumes to be. 16% so that crude protein = n x 6. 25: structural classification, primary, based on amino acid composition and sequence, proteins are polymers consisting of widely varying numbers and combinations of 20-25 individual amino acids, linked by peptide bonds. Neutral: number of carboxyl groups = number of amino acid (cid:1) (cid:1) groups: e. g. glycine. Acidic: number of carboxyl groups exceeds number of amino acid groups: e. g. glutamic acid. Basic: number of carboxyl groups is less than number of amino acid groups: e. g. lysine. Aromatic: containing a phenol ring: e. g. phenylalanine. Heterocyclic: diverse group with common feature of a cuclical (cid:1) (cid:1) side chain: essential and nonessential amino acids. Unlike plants and microbes, animals cannot synthesize amino (nh2) groups from inorganic n sources and must, therefore, must have a dietary source of ready-made amino acids.
