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]:  Two coxsackievirus B3 ( CVB3 ) variants ( H3 and H310A1 ) differ by a single amino acid mutation in the VP2 capsid protein .
[A]: VP2 capsid protein


[Q]:  Reactivity with the tegument protein encoded by UL21 was identified for an additional patient .
[A]: tegument protein


[Q]:  The expression of constitutively active MAP / ERK kinase kinase 1 ( MEKK1 ) inhibited RXRE - dependent transcription , whereas dominant negative MEKK1 increased the transcription , indicating the involvement of JNK signaling pathways in the process .
[A]:
dominant negative MEKK1