In addition, natural killer cell activity in bats is suppressed by upregulation of the natural killer cell-inhibiting receptor NKG2/CD94 and low level expression of major histocompatibility complex class I molecules. .
Vilevile, shughuli ya seli ya uuwaji asilia kwenye popo imedidimizwa kutokana na kuzalishwa kwa vipokezi vizuizi vya seli ya uuwaji asilia ya NKG2/CD94 na kiwango cha chini cha molekuli za aina ya I za mchanganyiko wa uoanifu wa tishu.