Final answer:
Enzymes like fingertipase have active sites with specific amino acid residues that facilitate catalytic functions.
Explanation:
Enzymes, such as fingertipase, have active sites that play a crucial role in catalyzing reactions. These active sites contain specific amino acid residues, such as His, Cys, Asp, Arg, and Glu, with functional groups capable of various catalytic functions. For example, enzymes like peroxidases utilize heme cofactors or redox-active cysteine residues in their active sites to interact with substrates.
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