(A) Comparison of the positions of BMC-TS and BMC-TD as they are embedded in the shell. BMC-TD sits slightly lower in the surrounding shell formed by BMC-H, which probably leads to small changes of interaction geometry.
(B) View of two reconstructions after sorting for four neighboring BMC-T positions. Left: Central BMC-TS surrounded by three BMC-TD building blocks; right: Central BMC-TD surrounded by three BMC-TS building blocks. See also Figures S7, S8.