A multi-protein complex that forms at the site of transcription initiation and is composed of RNA polymerase II, ubiquitous or general transcription or initiation factors (TFII or IF/eIF) and gene-specific enhancers/silencers.
The complex formed for initiation of translation. It consists of the 30S ribosomal subunit; mRNA; N-formyl-methionine tRNA; and three initiation factors .
Combination of a ribosomal light subunit, an mRNA molecule, and the tRNA charged with the first amino acid coded for by the mRNA; formed at the onset of translation.