HSS 2342 Chapter 6: Textbook notes
7 Feb 2017
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Document Summary
Protein is a vital structural and working substance in all cells. Protein is found in milk, eggs, legumes, and many grains and vegetables, and meat. Proteins contain the same atoms of carbohydrates and lipids. Carbon, hydrogen, oxygen, but also contain nitrogen. Amino acids: all amino acids have the same structure. Side chain distinct atom or groups of atoms. Unique side group: proteins are made up of about 20 different aa, each with a different side group, amino acids differ in size, shape, electrical charge, and other characteristics because in differences in side groups. Dispensable/ nonessential amino acids: nonessential = dispensable (more than half of aa body can synthesize them, essential = indispensable. Indispensable/ essential amino acids: 9 aa that the body cannot make at all or produce in sufficient quantity to meet the needs. Peptide bond unites each amino acid to the next. Cells link aa end to end in a variety if sequences to form thousands of different proteins.
