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

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The protein is binding to regulatory sequences and increasing the expression of certain genes, indicating that it is a transcription factor. Since it is only found in high concentrations in certain muscle cells, it is likely a specific transcription factor that is important for the regulation of genes in those cells.

A Protein Is Found in High Concentrations in Certain Muscle