1K0F:
reference: The crystal structure of Zn(II)-free Treponema pallidum TroA, a periplasmic metal-binding protein, reveals a closed conformation., Lee YH, Dorwart MR, Hazlett KR, Deka RK, Norgard MV, Radolf JD, Hasemann CA, J Bacteriol 2002 Apr;184(8):2300-4. PMID: 11914363

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