BIO 1140 Lecture Notes - Lecture 5: Kinesin, Vise, Centrosome
Document Summary
Finishing up on proteins: sequence = primary structure, secondary = folding and twisting of peptide chain due to interactions of the amino acid radical groups , 2 main: alpha-helix, beta pleated sheets: Beta-sheet more rigid, made of nonpolar amino acids, forms fibrous proteins. Hormonal proteins: control and regulate organism activities, globular proteins. Structural protein: collagen or keratin are examples, fibrous structure, beta pleated sheets. Contractile and motor proteins: produce movements, i. e actin and myosin. Receptor proteins: allow cell-cell communication by allowing responses to chemical stimuli. Enzymatic proteins: selective acceleration of chemical reactions, i. e digestive enzymes. Storage proteins: storage of amino acids, i. e ovalbumin. Cytoskeleton and extracellular matrix: the inside of a cell is a well organized scaffold of protein structures that carry out more than just a skeletal function for the cell, alp question. Besides its structural role, name at least 2 other functions that the cytoskeleton achieves in a typical cell.