Smaller systems are treated as independent ligands if they contain more than 10 atoms or as modifications if they have fewer than 10 atoms. Polynucleotide or polysaccharide systems with chain lengths of 2 or greater are treated as polymers. The number of residues of a structure's chain. Short Sequence Pattern Short elements found in the sequence given for the structure. Non-canonical residues are currently poorly represented.
X indicates any residue in a given position.
The 'cutoff value' limits the number of scores and alignments shown based on the expected number of scores. For consistency reasons, values are taken from calculated secondary structure elements according to the method of Kabsch and Sander, NOT from the author assignments. Number of alpha helices min. The experimental technique used to solve the structure including theoretical modeling. A complete structure model might be solved by more than one experimental method.