Profile: Plenum Scientific Research, Inc. manufactures selected biochemicals used in the field of research and diagnostics. Our products include ribonucleotides, deoxyribonucleotides, cyclic nucleotides & other analogs. We offer a full line of amino acids and some specialties such as driselase, transfer RNA's & methylene diphosphonic acid. We offer L-lysine hydrochloride, L-malic acid, L-methionine, L-phenylalanine, L-proline, L-serine, L-tyrosine, L-vailine, transfer ribonucleic acids, transfer ribonucleic acid from baker's yeast and transfer ribonucleic acid from e.coli B.