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The proximal sequence element (PSE)-binding transcription factor ( PTF ), which binds the PSE of both RNA polymerase II -and RNA polymerase III -transcribed mammalian small nuclear RNA (snRNA) genes , is essential for their transcription.
 PSE, mammalian small nuclear RNA (snRNA) genes, RNA polymerase III, proximal sequence element (PSE)-binding transcription factor, RNA polymerase II -and RNA polymerase III -transcribed mammalian small nuclear RNA (snRNA) genes, PTF, RNA polymerase II
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: cell line, protein, RNA, DNA, cell type 
Text: {0} 
Answer:
 PSE, mammalian small nuclear RNA (snRNA) genes, RNA polymerase III, proximal sequence element (PSE)-binding transcription factor, RNA polymerase II -and RNA polymerase III -transcribed mammalian small nuclear RNA (snRNA) genes, PTF, RNA polymerase II