Table 1.

Leukocyte Expression of FcγRII forms.

Cell type	FcγRIIA	FcγRIIB	FcγRIICa
T cells	ib	ib	?
B cells	—	+++	+
NK cells	—	—c	+
Macrophages	+++	++	?
Monocytes	+++	+	?
Neutrophils	+++	+	?
Eosinophils	++	•	•
Basophils	++	+++	—
Mast cells	++	—d	—
Platelets	++	—	—

+++ High, ++ Moderate, + Low, or — No expression. • no data.

^aExpressed only in ~20% of humans;

^bExpression induced in some T cell subpopulations;

^cExpressed as a result of promoter modification related to FcγRIIC allelism.

^dConflicting results.