title: The architecture of the potexviruses.
abstract: The gross structural parameters describing particles of viruses of the Potex group are presented with particular reference to five hitherto unanalyzed definitive or putative members of the group. The new evidence in conjunction with published results for other members of the group leads to the hypothesis that all Potexviruses have essentially the same architecture. In particular, each particle has almost the same number of subunits per turn and that number is probably 9. The different viruses mainly differ in the fractional departure from n = 9 and in the size of the true repeats, values of 8 3/4 , 8 4/5 , 8 5/6 , 8 5/7 , 8 7/8 , 8 9/10 , and 8 9/11 subunits per turn of the helices of the various viruses described here and/or previously being obtained.
authors.affiliation: Department of Chemistry, University of Western Ontario, London, Ontario N6A 5B7, Canada.
authors.forename: J F
authors.initials: JF
authors.lastname: Richardson
authors.forename: P
authors.initials: P
authors.lastname: Tollin
authors.forename: J B
authors.initials: JB
authors.lastname: Bancroft