Figure 4: Structural alignment of antifreeze protein from sea raven - 2AFP, Protein Data Bank (PDB) database: http://www.rcsb.org/pdb/cgi/explore.cgi?pid= 143951044353134&pdbId=2AFP [56] -, subunits A and B of factor IX/X binding protein (1BJ3A and B), human lithostathine (1LIT), CRD domain of H1 subunit of asialoglycoprotein (1DV8), tetranectin (1TN3), mannose-binding protein A (2MSB), human E-selectin (1ESL). Numbers indicate position of residues involved in each type of Ca2+ binding.