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]:  In vitro , c - Src phosphorylated FAK Tyr - 925 in a glutathione S - transferase - FAK C - terminal domain fusion protein , whereas FAK did not .
[EX A]: c - Src

[EX Q]:  Indeed , after a single oral dose , the role of the mu - receptor agonist component of the antinociceptive effect of tramadol appears to be minor , with most of the analgesic effect being attributable to nonopioid properties of the parent compound .
[EX A]: mu - receptor

[EX Q]:  Our case , however , had no histologic evidence of malignancy , no serum alpha fetoprotein at 7 months of age , and no recurrence at 1 years .
[EX A]:
serum alpha fetoprotein