[Role of low-molecular weight factors isolated from Methanobacillus kuzneceovii in the activating effect of visible light on methane formation and reduction of pyridine nucleotides].

Four low molecular weight fluorescent factors are isolated from thermophylic methaneproducing facteria Methanobacterium kuzneceovii. These factors are: the factor 340; the factor 420 (both reduced and oxidized); and a flavine derivative, comprising together with proteins a biochemical system, which reduces pyridine nucleotides in dark (at 55degrees C) and in the light (at 21degrees C).