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.
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Question:  Using unidirectional PCR we isolated a 361 - bp 5 ' promoter region and delineated the intronic / exonic boundaries which include a non - coding exon 1 , a single intron , and a coding exon 2 , a structure that is typical of genes of the RNase A superfamily .

Answer: RNase A superfamily


Question:  Biochemical experiments and genome sequencing have shown that , despite the prokaryotic cell and genome organization , basal transcriptional elements of members of the domain Archaea ( i . e . , TATA box - like sequences , RNA polymerase , and transcription factors TBP , TFIIB , and TFIIS ) are of the eukaryotic type .

Answer: RNA polymerase


Question:  It was found that on the 14th and 21st day after cimetidine administration serum gastrin levels were significantly elevated .

Answer:
serum gastrin