BCHS 3304 Study Guide - Final Guide: Spontaneous Process, Membrane Protein, Sodium-Potassium Alloy
8 Dec 2016
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Free energy of spontaneous process is negative: g= h-ts. G=-rtlnkeq: g is free energy, r is gas constant 8. 3145 j/kmol, aa + bb cc + dd, keq= ([c]c [d]d)/([a]a [b]b) Amino acids= building blocks of proteins: review all, backbone is made of c alpha, n , carbonyl c, nonpolar- gly, ala, val, leu, ile, met, pro, phe, trp. Uncharged- ser, thr, asn, gln, tyr, cys. G= h - ts (-) at all t (-) at tt=h/s (+) at all t: peptide bonds dipeptide, tripeptide, oligopeptide, polypeptide. Condensation of two amino acids peptide bond: similar side chains are interchangeable- conservative substitution, at physiological ph both carboxylic and amino groups are charged. Overall no charge if the r group does not carry a charge: isoelectric point- no net charge. Can be charge at some areas, but no net. Works on the n terminus of a polypeptide chain: unless the n terminus is acetylated.
