The packing of α-helices: simple coiled-coils

Abstract

F. H. C. CRICK 689 until it coincides with the position of our (x', y', z') frame at t = 0, i.e. with its origin at (r0, ~00, z0) in our basic frame and with its x axis perpendicular to our basic z axis and pointing directly away from it. It can be shown that we should put r I : r s ~OM = 2~M(zdc) cos a, ~ = ~+{(N~-~C0)/M}~. It should be remembered that (rs, ~, z~) should refer to a left-handed helix in a right-handed frame. I should like to thank Mr G. Kreisel for a number of interesting discussions and in particular for suggesting the use of Parseval's theorem at a crucial point.