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: Interestingly , unlike PAK65 , HPK1 does not contain the small GTPase Rac1 / Cdc42 - binding domain and does not bind to either Rac1 or Cdc42 , suggesting that HPK1 . activation is Rac1 / Cdc42 - independent .

A: small GTPase
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Q: The use of specific somatic cell hybrids have allowed us to locate the YAC contig telomeric to the D3F15S2 locus , in a region which is frequently deleted in lung carcinomas .

A: D3F15S2 locus
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Q: We identified Tyr ( 112 ) and Leu ( 175 ) within the RNA - binding domain of the U1 70K protein to be cross - linked to G ( 28 ) and U ( 30 ) in stem - loop I , respectively .

A:
U1 70K protein
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