The enzyme HIV-1 protease is produced by the HIV virus.
The enzyme is formed from two identical chains of 99 amino acids. In each chain, amino acids 25, 26 and 27 in the sequence form part of the active site.
Which levels of structure control the shape of the active site of the HIV protease?
A. primary, secondary and tertiary only
B. primary, secondary, tertiary and quaternary.
C. primary and quaternary only
D. secondary and tertiary only
E. quaternary only