Rho protein, that is necessary for transcription termination, is a ________(a) Homotetramer(b) Heterotetramer(c) Heterohexamer(d) HomohexamerThe question was posed to me in an online quiz.The question is from Transcription in Prokaryotes : Termination in division Gene Expression : Transcription Prokaryotes of Cytogenetics

Rho protein, that is necessary for transcription termination, is a ___

1.	Rho protein, that is necessary for transcription termination, is a ________(a) Homotetramer(b) Heterotetramer(c) Heterohexamer(d) HomohexamerThe question was posed to me in an online quiz.The question is from Transcription in Prokaryotes : Termination in division Gene Expression : Transcription Prokaryotes of Cytogenetics
Answer» RIGHT option is (d) Homohexamer For explanation I would say: Rho is a 46KDa hexameric protein with 6 IDENTICAL subunits. Thus, it is a holohexamer. A four subunit protein with all identical subunit would be a holotetramer, not identical subunit would be heterotetramer respectively.

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