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.

 The clr1 locus regulates the expression of the cryptic mating - type loci of fission yeast .
clr1 locus

 This enhancer element functioned in a position - and orientation - independent manner both on the Pax - QNR P0 promoter and the heterologous thymidine kinase promoter .
thymidine kinase

 The pattern of net RNA expression in adult mouse tissues is different .

net RNA