Search for structures based on the number of chains in the biological assembly.
The biological assembly is the arrangement of macromolecules in the structure that is believed to be the biologically
meaningful molecular assembly. In structures determined by X-ray crystallography, the biological assembly may contain one
copy of the asymmetric unit, multiple copies of the asymmetric unit, or a portion of the asymmetric unit. For more information,
Chains are the individual polymers (macromolecules) contained in a PDB structure. A structure may contain multiple identical
chains. Hence, this search option queries for the total number of polymers in the biological assembly, regardless of whether that
includes multiple identical molecules.
The biological assembly of the ferritin structure 1AEW is comprised of 24 copies of a single polymer chain.
Enter "Between 24 and 24" and press "Submit Query" to return all structures that contain exactly 24 chains
in the biological assembly. The results include 1AEW.
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