In zinc finger proteins, the amino acid residues that coordinate

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In zinc finger proteins, the amino acid residues that coordinate zinc are

1. Cys and His
2. Asp and Glu
3. Arg and Lys
4. Asp and Arg

Correct Option: A

Zinc fingers coordinate zinc ions with a combination of cysteine and histidine residues. They can be classified by the type and order of these zinc coordinating residues (e.g., Cys₂His₂, Cys₄, and Cys₆).