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

Answer: cDNA encoding myoD


Question:  The exon sequences determined from genomic DNA sequencing showed some differences when compared to the published rat GLUT2 cDNA .

Answer: rat GLUT2 cDNA


Question:  A rare tRNA - Arg ( CCU ) that regulates Ty1 element ribosomal frameshifting is essential for Ty1 retrotransposition in Saccharomyces cerevisiae .

Answer:
Ty1 element