BISC401 Lecture Notes - Lecture 6: The Double Helix, Chromosome, Gc-Content

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Enzyme kinetics suggest that enzymes (e) bind substrate molecules (s) at a fixed and limited number of sites the e(cid:374)z(cid:455)(cid:373)es" a(cid:272)ti(cid:448)e site: the bound species is known as an enzyme-substrate (es) complex. At high concentrations of substrate, all the binding sites of the enzymes have substrate bound, the substrate-binding sites are said to be saturated with substrate. The es complex is in equilibrium with the unbound enzyme and substrate and is an intermediate step in the conversion of substrate to products (p) Intermediate structures, such as es and ex* form at the active site of the enzyme and require the participation of key amino acid residues. Enzymes catalyze the conversion of substrates to products by dividing the process into multiple, discrete chemical reactions that involve multiple, discrete enzyme substrate complexes. Enzymes taking part in a common metabolic process are generally located in the same cellular compartment, be it in the cytosol, at a membrane, or within a particular organelle.

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