Figure 3.
KIR genotypes for the human NK cells used in functional studies
KIR genotyping was performed on the donor-derived blood cells used in the functional studies (see “Materials and methods”). Dark boxes indicate the presence of a KIR gene and white boxes their absence. KIR3DL1 allele typing for donors 35 and 43 is also shown.
*Donors were coded numerically.
†Inhibitory KIR genes (2DL1-5 and 3DL1-2) encode for class I receptors with long cytoplasmic tails containing immunoreceptor tyrosine-based inhibitory motifs (ITIMs).16 Despite possessing a long cytoplasmic tail with ITIMs, KIR2DL4 has potential for both inhibitory and stimulatory function.46-49
‡Stimulatory KIR genes (2DS1-5 and 3DS1) encode receptors with short cytoplasmic tails that lack ITIMs.
§ELISPOT (∥) or ICS (¶) analyses were used to determine the proportion of NK cells inhibited by the indicated class I allotypes.