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Characters used in the classification of lactobacilli

ABSTRACT
General conventional phenotypic characteristics differentiating species and groups of Lactoba-cillus are reviewed. Newer approaches to taxonomic studies, such as cell wall structure, metabolic pathways of substrate utilization, enzyme activity and homology or heterology of enzyme structure, are discussed. Experiments and problems in lysing highly resistant cells to obtain DNA and RNA for nucleic acid homology studies are described.