Cell Markers

Macrophages

CD14, CD40 MHC II and B7 (they are APC's of course) Fc and C3b receptors

Natural killer cells

CD-16 (binds Fc of IgG) CD-56 (unique for NK cells)

T-reg cells

CD-3, CD-4 CD-25 (contain the alpha chain of IL-2 receptor)

T-helper Cells

CD-4+ CD-40ligand

Cytotoxic T-cells

CD-8+

What receptor protein binds LPS

CD-14 on Macrophages TCR on T-cells

All B-cells

Some kind of Ig (IgM and IgD on immature cells) CD-19 CD-20 CD-21 (EBV receptor) CD-40 (binds CD-40ligand on T-helpers) MHC II, B7

All T-cells

TCR (binds antigen MHC II complex) CD-3 (signal transduction with TCR) CD-28 (binds B7 on APC's)