01826nas a2200373   4500000000100000008004100001260001700042653001200059653001500071653001800086653001400104653002000118653001900138653002200157653001100179653001200190653000900202653001800211653002400229653002500253653003100278100001800309700001200327700001600339700001500355700001300370700001400383700001400397245012900411300001100540490000600551520088100557022001401438       1984                            d  c1984 Oct-Dec10aAnimals10aArmadillos10aCell Membrane10aCell Wall10aCorynebacterium10aFreeze Etching10aFreeze Fracturing10aHumans10aleprosy10aMice10aMycobacterium10aMycobacterium avium10aMycobacterium leprae10aMycobacterium lepraemurium1 aBenedetti E L1 aDunia I1 aLudosky M A1 aNguyen V M1 aDang D T1 aRastogi N1 aDavid H L00aFreeze-etching and freeze-fracture structural features of cell envelopes in mycobacteria and leprosy derived corynebacteria.  a237-480 v23 a<p>The structural properties of the cell wall and cell membrane of several mycobacteria and of Leprosy Derived Corynebacteria are investigated by freeze-etching and freeze-fracture. In all cases the freeze-fracture split the cell wall in two asymmetric halves. The cell wall fracture faces of the mycobacteria are characterized by a filamentous network which vary with respect to the amount and complexity among microorganism of the same species and even more of different species. In LDC the structure organization of the cell wall and cell membrane differs from that of mycobacteria. The most stricking difference is the presence on the fracture faces of the LDC cell wall of different classes of particulated entities of yet unknown nature. In the mycobacteria and LDC the periseptal annuli likely provide a potential frame for cell envelope and cell membrane assembly.</p>  a0001-5938