According to Figure 1, within the protein ARKKKK60491, which of the following locations contain polypeptide N-termini? I. Position A II. Position B III. Position C

(A) I only

(B) I and II

(C) II and III

(D) I and III

The enzymatic catalysis of a reaction essential in the production of dog saliva is mediated by the protein ARKKKK60491. ARKKKK60491 is a homodimer, with each subunit being 337 amino acids. Figure 1, below, indicates a modular structure of the homodimer. Three positions are indicated on the model. Position A is the active site. Position B is a region known to have a large number of nonpolar residues. Position C is known to have a large number of charged residues.

Transcribed Image Text:

B -------- A C