HSCI 1105 Lecture 11: Proteins
24 Oct 2016
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Contained in foods of both animal and plant origins. Proteins are a sequence of amino acids (20 in all: essential nutrients (9 total, cannot make these nutrients in sufficient amounts so we must get them from our diet, other (11 total) a. Our bodies make a sufficient amount of this by itself so we do not have to consciously make diet decisions to get them ii. Building blocks : amino acids: proteins have a 3-d shapes, very large and diverse molecules, sequence of proteins are dictated by amino acids, structure of amino acids i. Central carbon : bonds with four molecules: hydrogen, carboxyl (--cooh, amino (nh 2 , r group, polypeptide chains, four levels of protein structure i. ii. iii. iv. Secondary: coiling or folding of polypeptide chains. Quaternary: final 3-d structure of one chain binding to other chains to create one big protein iii.
