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.

 Four of these fibroblast clones were infected with a retrovirus containing the cDNA encoding myoD and a puromycin selection marker .
cDNA encoding myoD

 Like troponin Cs and calmodulins , PfCPK also contains four EF hand calcium - binding motifs .
troponin Cs

 In this study we cloned the cDNA of AD1 Ag from a rat basophilic leukemia 2H3 cDNA library .

AD1 Ag