BIOL 2020 Study Guide - Midterm Guide: Glutamic Acid, Aspartic Acid, Ammonium Sulfate
14 Sep 2016
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Aspartic acid (aspartate)-asp-d-acidic negative, cysteine-cys-c-polar uncharged, glutamic acid (glutamate)- Glu-e-acidic negative, glutamine-gln-q-polar uncharged, glycine-gly-g-nonpolar, histidine-his-h-basic positive, isoleucine-ile-i-nonpolar, leucine-leu-l-nonpolar, lysine-lys-k-basic positive, methionine-met-m- Natural polymers: cellulose, starch glucose, proteins amino acids (1 cooh group and 1 nh3 group) nucleic. Acid nucleotide (nitrogenous base: a, g, c, t/u), phosphate group, sugar: ribose/deoxyribose . Electrostatic interaction: na + cl, hydrogen bonding: h n, o, f. Henderson-hasselbalch equation: ph = pka + log [a] / [ha] Zwitterions: have both positive and negative charges on same molecule (neutral) Isoelectric point: the ph at which a molecule (amino acid or peptide) has no net charge; pi = (pk1 + pk2) / 2. Peptide bond (c-nh3): bond formed between the carboxyl group of one molecule and the amino group of another molecule. Monomer: protein consists of a single polypeptide chain, oligomer: protein consists of 2 or more polypeptide chains up to 10, conjugated: contain amino acids and some other chemical group (prosthetic)
