1FOU:
reference: Structure of the bacteriophage phi29 DNA packaging motor., Simpson AA, Tao Y, Leiman PG, Badasso MO, He Y, Jardine PJ, Olson NH, Morais MC, Grimes S, Anderson DL, Baker TS, Rossmann MG, Nature 2000 Dec 7;408(6813):745-50. PMID: 11130079

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