Hemerythrin and Hemocyanin Are:
A)human Mutant Hemoglobins with Decreased Oxygen $\alpha$

Multiple Choice

Hemerythrin and hemocyanin are:

A) human mutant hemoglobins with decreased oxygen affinity.
B) hemoglobin variants that are found in animals at high altitude.
C) synthetic derivatives of hemoglobin's heme group used in artificial blood substitutes.
D) oxygen transport proteins found in invertebrates.
E) tetrameric hemoglobin derivatives containing only $\alpha$ -chains ( $\alpha$ ₄ tetramers) .