MHC Class II is an approximately 3000Da endoplasmic reticulum MHC Complex protein expressed in B cell lymphocytes; Antibodies to MHC Class II can be used to study immune response. MHC Class II, also known as HLA, is a designation for MHC Class II.To search for specific applications, reactivities or host species simply check the filter boxes in the left column. Visit the supplier page to learn important details about a given antibody such as its target specificity and validated applications.