messenger RNA
1961 Jacob & Monod (Pasteur Institute, Paris)
mRNA complementary to 1 of 2 DNA strands
mRNA code read during translation
Read by ribosomes in cytoplasm (large & small subunits)
Ribosome subunits join when synthesis starts
Ribosomes made of protein & ribosomal RNA
Many mRNAs per gene ; many proteins per mRNA
Amplifies output from gene