messenger RNA (mRNA)
The magnetotatic bacterium Magnetospirillum magnetotacticum.
Messenger RNA (mRNA) is a molecule of RNA that serves as a template for protein synthesis. mRNA is transcribed from a gene and then translated by ribosomes in order to manufacture a protein. Each set of three bases, called codons, specifies a certain protein in the sequence of amino acids that comprise the protein. The sequence of a strand of mRNA is based on the sequence of a complementary strand of DNA.