BIO SCI 93 Lecture Notes - Lecture 4: Phosphodiester Bond, Sickle-Cell Disease, Ubiquitin

• School: UC-Irvine
• Department: Biological Sciences
• Course: BIO SCI 93
• Professor: Jorge Busciglio

Document Summary

Lec 4: proteins include a diversity of structures, resulting in a wide. Proteins: account for more than 50% of the dry mass of most cells, and are instrumental to everything organisms do. Some speed up reactions, while others defend, act as storage, transport, move, communicate, or act as structural support. Catalysts: chemical agents that speed up a reaction, without being consumed by the reaction. Protein: one of more polypeptide with specific 3d conformation. Hydrophobic (9/20), hydrophilic polar (6/20), ionized acids bases (5/20) Protein"s: biological functional molecule that consists of one or more polypeptides, each folded into 3d structures. Amino acid: organic molecule possessing both an amino group and carboxyl group. Center of the amino acid is an asymmetric carbon atom called the alpha carbon. Four different partners: amino group, carboxyl group, hydrogen atom, and a variable r, which is a side chain, which varies for each amino acid.