Zinc uptake regulator and DNA, illustration
Illustration of a zinc uptake regulator (ZUR) protein (blue) from the bacterium Streptomyces coelicolor and RNA polymerase (multicoloured) complexed with DNA (deoxyribonucleic acid, helical). RNA (ribonucleic acid) polymerase transcribes DNA to a complementary strand of RNA. ZUR binds to DNA to activate the transcription of genes that are involved in zinc homeostasis., by FRANCISCO J. ENGUITA/SCIENCE PHOTO LIBRARY
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