NTS 135 Lecture Notes - Lecture 5: Blood Proteins, Amine, Lipoprotein
Document Summary
Plant protein(incomplete; supply less than req. ) vs animal protein (contain all indispensable aa in amounts needed to support protein synthesis) Amino acids: structural units of proteins (c, h, o, n, s) Peptide bonds: attach amino groups to carboxyl groups. )ndispensible (cid:523)essential, 9(cid:524): can"t be synthesized by body, must be supplied: dispensable (nonessential, 5): can be synthesized by body adequately, conditionally indispensable (6): in between, body unable to synthesize by food adequately, can under certain conditions. Myosin (153 aa): fibrous, found in muscle, coil and unfold as muscle contracts/relaxes. Hemoglobin(4 globin poplypeptides): round, non-protein + iron containing heme. Albumin (single chain of 584 aa): major plasma protein, round: drugs, hormones, enzymes, trace elements, colloidal pressure helps maintain fluid balance (blood in side vascular space, no leakage) Easily broken down to meet immediate needs (1% total body protein) Protein balance: balance of protein synthesis (anabolism) and protein breakdown (catabolism)
