1FCE:
reference: The crystal structure of the processive endocellulase CelF of Clostridium cellulolyticum in complex with a thiooligosaccharide inhibitor at 2.0 A resolution., Parsiegla G, Juy M, Reverbel-Leroy C, Tardif C, Belaich JP, Driguez H, Haser R, EMBO J 1998 Oct 1;17(19):5551-62. PMID: 9755156

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