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]:  Engineering temperature - sensitive SH3 domains .
[EX A]: SH3 domains

[EX Q]:  Consistent with this , rh5 expression in R8 disappears when R7 cells are absent ( in sevenless mutant ) .
[EX A]: sevenless mutant

[EX Q]:  The nucleotide sequence of a PCR - amplified SMT3A genomic DNA fragment was found to be identical to that of SMT3A cDNA , indicating the absence of intron ( s ) in its protein coding region .
[EX A]:
SMT3A cDNA