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:  The Valpha and Vbeta domains have the canonical features of known teleost and mammalian TCR V domains , including conserved residues in the beginning of FR2 and at the end of FR3 .
Example Output: Vbeta domains

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

Example Input:  K562 erythroleukemia cells stably transfected with constructs containing the human Agamma - globin promoter linked to an enhanced green fluorescent protein ( EGFP ) reporter , with or without HS2 , were analyzed for EGFP expression by flow cytometry .
Example Output:
green fluorescent protein

