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.
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Question:  To probe the inter - relationship between the virion - anchoring function and the oligomerization function , we constructed two serotype 3 ( T3 ) sigma 1 deletion mutants in SV40 expression vectors , one lacking the hydrophobic tail and the hinge , and the other lacking an adjacent region which constituted part of the coiled - coil .

Answer: sigma 1


Question:  We prospectively studied serum prolactin ( PRL ) elevation after different types of documented seizures in 17 patients .

Answer: serum prolactin


Question:  The nucleotide sequence of the estrogen receptor gene of Oreochromis aureus ( OaER ) indicates that the hormone - binding E domain is composed of 4 exons interspersed by short introns of only 0 . 18 - 1 . 3 kb each .

Answer:
estrogen receptor