Description Aplha, transcription related growth factors and stimulating factors or repressing nuclear factors are complex subunits of proteins involved in cell differentiation. Complex subunit associated factors are involved in hybridoma growth, Eosinohils, eritroid proliferation and derived from promotor binding stimulating subunits on the DNA binding complex. NFKB 105 subunit for example is a polypetide gene enhancer of genes in B cells.The activation of transcription factor subunits is the first step of gene expression, in which a particular segment of DNA is copied into RNA (mRNA) by the enzyme RNA polymerases. Transcription factors, unites and elongations can be RNA and DNA nucleic acids, base pairs of nucleotides . Converting from DNA to RNA is made by enzymatic reactions. During transcription, a DNA sequence is read by an RNA polymerase, which produces a complementary, anti-parallel RNA strand called a primary transcript. Transcriptions are key functions in signal transduction pathways. Signaling ligand binding transcription factors play an important role in transduction cascades.