特異性：Human CD8 CD8 is a 32 kDa transmembrane glycoprotein expressed as either a CD8alphaalpha homodimer or CD8alphabeta heterodimer. It is expressed on the "cytotoxic/suppressor" subpopulation of peripheral T cells. CD8 functions primarily as a coreceptor with MHC Class I-restricted TCR's in antigen recognition.1, 2
