Schematic of AP205 CP arrangement near the 3-fold axis of symmetry and the assignment of lysine residues K4, K61, and K94 that participated in the cross-linking reaction. In the schematic, three dimers are shown with their monomers colored in blue and green. Only one tether (red coil) connected either of the two of K4K94 linkage possibilities or the one of K4K61 linkage possibility. The end-to-end probability distributions of bPEGntethers (n= 9, 17 and 25) calculated from an analytical worm-like chain model.(44)