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.

Question

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.

Quizplus · Accepted Answer

The immunoglobulin (Ig) superfamily includes a large number of important proteins of the immune system, such as antibodies, cell receptors (BCRs), T cell receptors (TCRs), co-receptors, and invariant chains associated with BCRs and TCRs. They all have Ig or Ig-like domains in their structure. Also bearing Ig domains, MHC proteins are highly polymorphic.

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