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:  Strains carrying a snf1 mutation are unable to grow on sucrose , galactose , maltose , melibiose , or nonfermentable carbon sources ; utilization of these carbon sources is regulated by glucose repression .

A: snf1 mutation
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Q:  We identified two potential phosphorylation sites at serine49 and serine133 , both of which seem to be necessary for Myf - 5 activity .

A: Myf - 5
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Q:  Comparison of the predicted amino acid sequence with that of the Drosophila virilis gene shows that several blocks of amino acid sequence have been very highly conserved .

A:
Drosophila virilis gene
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