In this task, you are given a sentence. You are expected to recognize the name of gene or protein. Although there might be several correct answers, you need to write one of them.

[Q]: In S . cerevisiae , there is evidence that Sir3p ( hence the SIR complex ) has much higher affinity to unacetylated histone H4 than acetylated H4 ( 5 ) .
[A]: S . cerevisiae

[Q]: Thus , full correlates of protection mediated by the adaptive immune system against B . mallei remain to be fully elucidated .
[A]: B . mallei

[Q]: However , no detectable domains or nuclease activity could be identified for the E . coli RdgC protein ( 2 , 6 ) .
[A]:
E . coli