A Protein Is Found in High Concentrations in Certain Muscle

Multiple Choice

A protein is found in high concentrations in certain muscle cells in mice but is found in very low concentrations in other cells.In these muscle cells the protein binds certain regulatory sequences, increasing the expression of certain genes.This protein is most likely

A) a sigma factor.
B) a general transcription factor.
C) a specific transcription factor.
D) an enhancer.
E) TFIID.