NTDT200 Lecture Notes - Lecture 8: Lean Body Mass, Complete Protein, Messenger Rna
11 Oct 2018
School
Department
Course
Professor
Document Summary
Protein: a group of amino acids and a macronutrient, containing c, h, o + nitrogen. 1 g of protein = 4 calories. Each amino acid containing an amino group, side chain, acid group, central carbon. Each varying in proportions and sequences making up over 22,000 proteins in our bodies. 9 essential amino acids, 11 nonessential amino acids. Essential acids cannot be produced by the body and must be obtained through diet. Nonessential acids can be produced by the body. Proteins are synthesized in a two step process: transcription and translation. Transcription takes place in the nucleus then goes into the cytoplasm (messenger rna brings to ribosomes) translation takes place. The shape of proteins determines their functions. After translation, amino acid chains fold into a particular shape. Denaturation alters the shape and function of proteins. Caused by heat, light, change in ph, alcohol, or motion.
