Abstract
Activation and inhibition of a purified aminopeptidase from Brevibacterium linens was investigated using L-alpha-leucyl-4-nitroanilide and L-leucyl-L-leucine as substrates. The enzyme was activated by cobalt, provided that the enzyme was preincubated with the metal. Strong inhibitory effects were derived from heavy metals, metal-complexing compounds, reducing agents, the modification of aromatic amino acids, and the presence of hydrophobic substances or certain amino acids in the test mixtures. Supposing that this B. linens aminopeptidase plays a part during surface-ripening of cheeses, possible consequences of specific technological conditions for its activity are discussed.
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