makeSpheresCluster(radius = 0.005, N, R0 = 0.5,
pitch = 0.6, delta = pi/8, delta0 = 0, right = TRUE)clust.equalangles,
clust.equalsizes, helix,
helix.zt, makeDimerCluster,
makeDimerDihedral,
makeHelixCluster,
makeHelixCluster.zt,
makeRodChain