Step 1 Krebs Cycle. 77. Inhibited by a high concentration of ATP that joins at allosteric site. 78. PEP loses phosphate group through substrate level phosphorylation. 79. Isomerization changes the configuration of atoms in the compound. 80. Acts to combine acetyl-group to oxaloacetate. 81. Produced by the oxidation of a-Ketoglutarate.

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