| Breast cancer metastasis suppressor 1 ( BRMS 1 ) forms complexes with retinoblastoma binding protein 1 ( RBP 1 ) and the mSin 3 histone deacetylase complex and represses transcription . ^^^ Breast cancer metastasis suppressor 1 ( BRMS 1 ) forms complexes with retinoblastoma binding protein 1 ( RBP 1 ) and the mSin 3 histone deacetylase complex and represses transcription . ^^^ |