(A) Crystal structure of the monomer of PGI/PMI from Pyb

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(A) Crystal structure of the monomer of PGI/PMI from Pyb (A) Crystal structure of the monomer of PGI/PMI from Pyb. aerophilum (PDB accession number 1X9H) (87), which shows the PGI superfamily fold. (A) Crystal structure of the monomer of PGI/PMI from Pyb. aerophilum (PDB accession number 1X9H) (87), which shows the PGI superfamily fold. Both PGI/PMIs and classical PGIs constitute distinct families within the PGI superfamily. (B) Monomer of cPGI from Pyr. furiosus (PDB accession number 2VAR) (96), which shows the small barrel formed by two β sheets, typical of the cupin superfamily. Christopher Bräsen et al. Microbiol. Mol. Biol. Rev. 2014; doi:10.1128/MMBR.00041-13