Which of the Following BEST Represents the Relationship of Polypeptide

Multiple Choice

Which of the following BEST represents the relationship of polypeptide units in MHC class II?

A) ? and ? chains from any gene can pair with each other
B) Only . ? and ? chains from the same gene can pair with each other
C) Only ? and ? chains of the same allele can pair with each other
D) ?
Chains can pair with other ? chains, but ? ? chains can only pair with chains.
E) ? and ? chains pair until the complex is exported to the cell surface and can bind ? 2-microglobulin