Select your answer:
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Immunology › ViewHow many different MHC classical class I proteins does each nucleated cell in a human heterozygous at the MHC locus potentially express?
A. none
B. one
C. two
D. three
E. six
Heart Anatomy › View
Valve that blood is forced through from right ventricle into pulmonary arteries.
A. pulmonary valve
B. aortic valve
C. mitral valve