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SEM analysis of twisted chains. (A) RP102 (genes deleted: PBPs 1a, 4, 5, 6 and 7; AmpC, AmpH, AmiA, and AmiC). (B) Higher magnification of boxed area shown in panel A. (C) Examples of “saddle joint” cell junctures, one boxed and two others indicated by white arrows. (D) Higher magnification of saddle joint in boxed area of panel C.
