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]:  Recently we have performed a detailed analysis of specific neuronal populations affected by the mutation which shed new light on the role of Krox - 20 in the segmentation and on the physiological consequences of its inactivation .
[EX A]: Krox - 20

[EX Q]:  When expressed in Escherichia coli , SH - PTP2 displays tyrosine - specific phosphatase activity .
[EX A]: SH - PTP2

[EX Q]:  We have thus cloned two yeast homologs of mammalian p220 .
[EX A]:
mammalian p220