1Q56:
reference: Modulation of agrin function by alternative splicing and Ca2+ binding., Stetefeld J, Alexandrescu AT, Maciejewski MW, Jenny M, Rathgeb-Szabo K, Schulthess T, Landwehr R, Frank S, Ruegg MA, Kammerer RA, Structure (Camb) 2004 Mar;12(3):503-15. PMID: 15016366

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