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.

 As much thrombin was formed during cardiopulmonary bypass ( measured by the prothrombin activation fragment F1 + 2 and thrombin - antithrombin complexes ) as in normal patients , showing that factor XII was not necessary for thrombin generation .
factor XII

 We analyzed the effects of light on tubulin mRNA abundance in Arabidopsis seedlings using RNA gel blot hybridizations and gene - specific probes .
tubulin mRNA

 Oligomers corresponding to the region of the mlc - 1 / 3 enhancer , which encompasses this conserved sequence , bound MEF - 2 and competed for its binding to the mck enhancer .

MEF - 2