2NCM:
reference: The three-dimensional structure of the first domain of neural cell adhesion molecule., Thomsen NK, Soroka V, Jensen PH, Berezin V, Kiselyov VV, Bock E, Poulsen FM, Nat Struct Biol 1996 Jul;3(7):581-5. PMID: 8673600

This OCA Structure page
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