Oriǵin, Development and Significance of L-forms in Bacterial Cultures Klieneberger-Nobel, Emmy,, 3, 434-443 (1949), doi = https://doi.org/10.1099/00221287-3-3-434, publicationName = Microbiology Society, issn = 1350-0872, abstract= SUMMARY: Several Gram-negative bacteria produce pleuropneumonia-like (L-) forms, some under ordinary cultural conditions, others only when exposed to abnormal ones. The formation of these bodies starts with the production of small nuclear elements surrounded with a thin cytoplasmic layer; these elements fuse with neighbouring elements and the L-body is complete. Whereas some L-strains reproduce themselves indefinitely, others revert to the bacterial form. Thus the bacterial and the L-forms are now regarded as two different generations of the same organism and my symbiosis theory is abandoned., language=, type=