Source:http://linkedlifedata.com/resource/umls/id/C0040648
MSH: Endogenous substances, usually proteins, which are effective in the initiation, stimulation, or termination of the genetic transcription process.,CSP: diverse group of viral, prokaryotic, and eukaryotic proteins which interact with specific sites on DNA or its associated proteins to initiate or inhibit transcription; not all are DNA binding proteins per se, although that is a BT.,NCI: Transcription factors are a diverse group of proteins that bind to DNA at specific promoter or enhancer regions. They also bind to DNA-associated proteins to initiate, stimulate, inhibit or terminate transcription. The proteins are often physically associated in a preinitiation complex and contain structural motifs.