LAGUNA DESIGN / SCIENCE PHOTO LIBRARY LAGUNA DESIGN / SCIENCE PHOTO LIBRARY
Transcription factor and ribosomal RNA (rRNA). Molecular model showing the 6 zinc fingers of transcription factor IIIA (green) bound to RNA (ribonucleic acid, magenta) from a 5s ribosome sub-unit. Transcription factors are proteins that bind to specific DNA sequences, and control the movement (transcription) of genetic information from DNA to mRNA (messenger RNA) during gene expression. Ribosomes are the site of translation, the process of protein synthesis from an mRNA template.
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