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.

[EX Q]:  In addition , mrp17 - 1 , in combination with some mutations affecting another mitochondrial ribosomal protein , caused a synthetic defective phenotype .
[EX A]: mrp17 - 1

[EX Q]:  The 5 - HT3 antagonist ondansetron reduced alcohol intake in both the medium and high alcohol preferring rats at doses between 0 . 01 and 0 . 16 mg / kg .
[EX A]: 5 - HT3

[EX Q]:  SH3A competes with the SH3 domains of Grb2 in binding to mSos1 , and the intersectin - mSos1 complex can be separated from Grb2 by sucrose gradient centrifugation .
[EX A]:
SH3 domains