A polynucleotide phosphorylase with a molecular weight of 100,000 has been isolated from Escherichia coli Q13 mutant and partially purified. This mutant is particularly rich in this low molecular species which can, however, also be found in small proportion in wild strains of E. coli B and K12...
Vigna benuensissp. nov. from north Cameroon is described. It is closely related toVigna ambacensisvar.pubigera, but is amphicarpic and shows slight differences in floral morphology and size. Some important morphological features are compared with those of its allied species....