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.

 It is an untested argument that conventional beta - adrenoceptor antagonists possess unwanted metabolic effects that may counter some of their potential cardiac benefits .
beta - adrenoceptor

 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 .
D3F15S2 locus

 We conclude from these observations that the cTnC 3 ' Ile element is a composite enhancer that functions through the combined interactions of at least five regulatory elements and their cognate binding factors : three or four E - boxes , a MEF - 2 site , and a MEF - 3 site .

MEF - 2

