Protein P7 of the cystovirus f6 is located at the three-fold axis of the unexpanded procapsid.
Katz G, Wei H, Alimova A, Katz A, Morgan DG, Gottlieb P. Protein P7 of the cystovirus f6 is located at the three-fold axis of the unexpanded procapsid. PLoS One. 2012; 7(10):e47489.