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.

Q:  Furthermore , the rapid light - mediated increase of CPRF proteins was insensitive to transcriptional inhibitors , suggesting that a post - transcriptional mechanism controls CPRF accumulation .

A: CPRF proteins
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Q:  Sequence analysis revealed 100 % homology of all RA - derived PTEN fragments to those from normal SF as well as to the published GenBank sequence ( accession number U93051 ) .

A: PTEN fragments
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Q:  Optical rotation of the second harmonic radiation from retinal in bacteriorhodopsin monomers in Langmuir - Blodgett film : evidence for nonplanar retinal structure .

A:
bacteriorhodopsin monomers
****