c3b receptors on human polymorphonuclear leukocytes ( pmn ) were nonrandomly distributed in small clusters on the plasma membranes of these cells when assessed by indirect immunofluorescence at 0 degree c using monospecific rabbit fab ' or f ( ab ' ) 2 anti-c3b receptor and tetramethylrhodamine isothiocyanate ( tritc ) -conjugated goat igg anti-f ( ab ' ) 2 .
C0007603
plasma membranes
C0007634
cells