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]: 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

[Q]: By sequencing of exonuclease III deletion clones an open reading frame of 405 nucleotides was found coding for a protein of 135 amino acids with a molecular mass of 15 kDa .
[A]: exonuclease III

[Q]: The increments in median plasma secretin concentration were 1 . 6 , 3 . 0 , and 6 . 4 pmol x 1 ( - 1 ) after secretin , 125 , 250 and 500 fmol x kg - 1 , and the corresponding 15 - min bicarbonate output 283 , 442 , and 1435 micromol , respectively .
[A]:
plasma secretin