CTCK domain. (A) Sequence alignment of VWF CTCK domain and TGF-β2 taken from Meitinger et al.⁸  Disulfides found both chemically¹⁴  and predicted⁸  or only predicted⁸  are shown with solid or dashed lines, respectively, and the cysteine predicted to form the interchain disulfide is shown with an asterisk. (B) Ribbon diagram of TGF-β2 crystal structure.⁴⁰  The most N-terminal region that does not align to VWF CTCK is deleted. The new N-terminus is shown as a Cα sphere.