BIOL 115 Lecture Notes - Lecture 5: Chemical Polarity, Peptide Bond, Hydrogen Bond

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21 Jun 2020

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Support that is, keratin forms hair and nails, collagen lends support to ligaments and skin. Transport: that is, channel and carrier proteins in cell membranes allow substances to leave and enter the cell, that is, transport molecules in the blood. Defense antibodies are proteins that bind to foreign substance called antigens and disable them. Motion contractile proteins allow parts of cells to move and muscles to contract. Components: an amino group, a carboxyl group and an r group. Each amino acid differs in its r group. The polar covalent bond between two amino acids. Three or more amino acids linked together. A protein"s 3-dimensional shape is closely linked to its function. Denaturation the change in the shape of a protein; caused by extreme heat or ph: disrupts the protein"s function. All proteins have primary, secondary, and tertiary levels of structure; only a few have quaternary structure. Shapes are created by hydrogen bonding between amino acids.

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