<prompt> Which in Pan T-cell marker -CD3CD8CD45CD30  <response>: Ans. is a i.e., CD3 Important facts about CD markers CD-3 is known as Pan T-cell marker. The most clearcut differentiation between T and B cells is by their surface markers, for example, by Demonstration of CD3 of T cells and Ig on B cells. CD-95 is a death receptor, member of TNF receptor family. It is involved in apoptosis. 