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. 2021 Jun 2;85(3):e00064-21. doi: 10.1128/MMBR.00064-21

TABLE 9.

Sequence identity and similarity of LCT glycosyltransferase domains

LCT % sequence identity (% similarity)a
TcdA TcdB TcsH TcsL TcnA
TcdB 51 (72)
TcsH 85 (92) 51 (73)
TcsL 53 (73) 76 (88) 55 (75)
TcnA 34 (53) 34 (54) 34 (52) 36 (54)
TpeL 46 (66) 44 (65) 46 (67) 48 (66) 34 (57)

aSequence identity and similarity were calculated using Water (EMBOSS) local alignment. LCTs are from the following strains: C. difficile VPI 10463, P. sordellii VPI9048, C. novyi 19402, and C. perfringens JGS1495. Under new subtyping analysis, TcdA and TcdB from C. difficile VPI 10463 are referred to as TcdA1 and TcdB1 (138).