1. c.153.1 YerB-like YerB-like 3 layers: b/b/a; central mixed beta-sheet of 9 strands, order 541329678; strands 3 and 7 are antiparallel to the rest; an unusual "over the other end" connection between strands 3 and 4 2psb d2psba1 A:192-203,229-236,254-262,292-299 11. b.102.1 Methuselah ectodomain duplication: contains two similar sub domains connected by a structured linker ! Methuselah ectodomain complex fold 1fjr d1fjrb_ B:65-70,96-103,105-112,140-145 1fjr d1fjra_ A:65-70,96-103,105-112,140-145 2pzx d2pzxa1 A:65-70,96-103,105-112,140-145 2pzx d2pzxc1 C:65-70,96-103,105-112,140-145 2pzx d2pzxd1 D:65-70,96-103,105-112,140-145 2pzx d2pzxb1 B:65-70,96-103,105-112,140-145