The complex of zinc and cysteine residues seen in the structure of steroid hormone receptors is referred to as a(an)______________ structural motif.
A)zinc loop
B)zinc helix
C)antiparallel zinc sheet
D)zinc finger
E)zinc turn

Question

Quizplus · Accepted Answer

The complex of zinc and cysteine residues seen in the structure of steroid hormone receptors is referred to as a zinc finger motif. The term "zinc finger" refers to the finger-like structure formed by the zinc ion coordinated to two cysteine and two histidine residues, which are located at specific positions in the protein sequence. This structural motif is found in many DNA-binding proteins and is important for the regulation of gene expression.

The Complex of Zinc and Cysteine Residues Seen in the Structure