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]:  However , these compounds did not have a significant effect on SDF1 alpha - induced mitogen - activated protein kinase activity .
[EX A]: SDF1 alpha

[EX Q]:  In contrast , the CBFbeta - smooth muscle myosin heavy chain ( SMMHC ) fusion protein generated by the inv ( 16 ) associated with acute myeloid leukemias ( M4Eo ) can not rescue definitive hematopoiesis by Cbfb - deficient ES cells .
[EX A]: fusion protein

[EX Q]:  Two B - cell - specific , cis - acting transcriptional regulatory elements have been identified .
[EX A]:
regulatory elements