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.

Example Input:  Some CHOP - C / EBP heterodimers apparently bind to alternative DNA sequence and thereby regulate the transcription of other genes .
Example Output: C / EBP

Example Input:  Using gel retardation analysis , four binding sites for Rap1p have been identified within the promoter of the RAP1 gene .
Example Output: RAP1 gene

Example Input:  Analysis of the 5 ' and 3 ' termini of the transcripts produced in vivo from the puf operon of R . sphaeroides PUF delta 348 - 420 ( three transcripts ; 0 . 59 , 0 . 64 , and 2 . 63 kilobases ) lacking the puf - intercistronic terminator structure were identical to those of the corresponding puf transcripts derived from wild - type R . sphaeroides 2 . 4 . 1 ( four transcripts ; 0 . 50 , 0 . 66 , 0 . 71 , and 2 . 7 kilobases ) showing that the transcripts begin and end at the same sites .
Example Output:
puf transcripts