1tcf is a 1 chain structure with sequence from Oryctolagus cuniculus. The August 2003 RCSB PDB Molecule of the Month feature on Calmodulin by Shuchismita Dutta and David S. Goodsell is 10.2210/rcsb_pdb/mom_2003_8. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.