1PHX:
reference: DNA packaging intermediates of bacteriophage phi X174., Ilag LL, Olson NH, Dokland T, Music CL, Cheng RH, Bowen Z, McKenna R, Rossmann MG, Baker TS, Incardona NL, Structure 1995 Apr 15;3(4):353-63. PMID: 7613866

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