Lect5-1.Proteins - Proteins Body Protein Content Body...

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Proteins
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Body Protein Content Body Protein Content Muscle - 50% (11 lbs) Bone - 23% (5 lbs) Skin - 10 % (22 lbs) Blood - 8% (1.8 lbs) Liver - 8% (1.8 lbs) Brain - 1.5% (0.3 lbs) Gastro - other
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Protein Content Protein Content About 10 kg (22 lbs) protein in body Distribution depends on: Gender Training Bones We can alter total protein of body
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PROTEIN COMPOSITION PROTEIN COMPOSITION Chemical organization similar to fats and CHO, except contains Nitrogen Nitrogen = 16% of protein molecule Proteins are polymers of their subparts that are called AMINO ACIDS (AA)
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Proteins Proteins [Amino Acids - AA] [Amino Acids - AA] Amino Radical - NH 2 Organic Acid Radical [1 carbon, 2 oxygen, 1 hydrogen (COOH)] Amino + Acid = Amino Acid 23 Different AA
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Common Features of AA Common Features of AA
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Amino Acid Structures Amino Acid Structures All amino acids have both an amino (-NH2) and an acid (-COOH) group, they differ only in the makeup of their R groups (green). In these examples the simplest (Glycine) has an R group consisting of a single hydrogen atom.
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MANY AMINO ACIDS MANY AMINO ACIDS Because there are so many ways the 23 different AA can link together, there are almost an infinite # of proteins Example Hb = 574 AA; Myosin = 4500 AA; insulin = 51 AA
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Lect5-1.Proteins - Proteins Body Protein Content Body...

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