Superposition of CbSAMT and AtIAMT1 (magenta). SAH and IAA (from docking calculations) are represented as green and yellow sticks, respectively. The mobile N-terminal active-site capping loop, the N-terminal cap-like domain, and the C-terminal SAM/substrate-binding domain of CbSAMT are colored red, orange, and cyan, respectively. This figure was produced with PyMOL (www.pymol.org).