| dc.description |
SOME time ago one of us (Gy. N.) published a communication<sup>1</sup> on a nitrogen-fixing micro-organism from the root nodules of Lupinus luteus. By analogy with leghæmoglobin, a red-coloured porphyrin pigment isolated by Virtanen<sup>2</sup> from root nodules of soya beans, Németh presented a working hypothesis of the hæmoglobin-like structure of his red pigment. Interpretation of ultra-violet spectroscopic measurements<sup>1</sup> seemed at the first glance to support this assumption. Furthermore, Matkovics and Tárnoki<sup>3</sup> reported to have isolatedâ whenever in impure stateâ a porphyrin methyl ester from root nodules of Lupinus Iuteus. As forecast by Németh<sup>1</sup> more extensive studies were still needed to support this assumption. We wish now to report on our ultra-violet absorption spectral examinations with pigments from strain Pr-E/3 of Németh, independently of the work by Schneider, and by Matkovics<sup>6</sup>. On the other hand, paper chromatographic investigation of the acidic extracts prepared from this micro-organism has also been carried out. |
