[Immunological characteristics of Methylomonas methanica membranes]

Immune sera were prepared against the antigenic complexes in the fractions of Methylomonas methanica cell wall, cytoplasmic membrane and intracytoplasmic membranes. The membrane fractions were studied immunologically in the reactions of agglutination, immunofluorescence and immunodiffusion. Some common features as well as differences were found among the membrane fractions in the antigenic structure. The membranes of M. methanica were shown to contain species-, genera- and type-specific antigens.