Nitrogenous bases are the parts of RNA and DNA that are involved in pairing up (see also base pairs). These include cytosine, guanine, adenine, thymine (DNA) and uracil (RNA).
... formed by Jean-Pierre Lévy[?] in Lyon in 1941. In December 1941 they began to publish Le Franc-Tireur underground newspaper. There were also members in the Mediterranean ...