Indicate True (T) and False (F) Statements Below Regarding the Proteins

Short Answer

Indicate true (T) and false (F) statements below regarding the proteins of our adaptive immune system. Your answer would be a four-letter string composed of letters T and F only, e.g. TTFT.
( ) Both B cell receptors and T cell receptors have domains with an immunoglobulin fold, which consists of a ?-sandwich and an intrachain disulfide bond.
( ) MHC proteins are the most polymorphic among human proteins.
( ) MHC proteins and CD4 and CD8 co-receptors are all members of the Ig superfamily.
( ) Both B cell receptors and T cell receptors are stably associated with invariant transmembrane protein chains that are required for activating intracellular signaling pathways.