NFS 043 Lecture Notes - Lecture 7: Collagen, Lipoprotein, Blood Proteins
10 Oct 2017
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Document Summary
All proteins are made up of amino acids (there are 20 different kinds of aa) Proteins are made up of a carbon with amine group (contains nitrogen) and acid group attached. Amino acids can be essential, conditionally essential, or nonessential. In order to form proteins from amino acids, use acid, which links an amine group to an acid group. Different protein shapes = different protein tasks. Proteins can function alone or in groups. Nutrients don"t influence dna, but they can influence gene expression- which proteins. Stomach: acid denatures protein in food, uncoils protein strands, enzymes attack peptide bonds. Small intestine: polypeptides- small pieces of protein, further breakdown by pancreatic and intestinal enzymes to mono and dipeptides. Protein is needed for structure and movement: muscle tissue takes up about 40% of body"s protein. Other structural proteins needed for tendons, cartilage, teeth, nails.
