5JIW:
reference: Amylose recognition and ring-size determination of amylomaltase., Roth C, Weizenmann N, Bexten N, Saenger W, Zimmermann W, Maier T, Strater N, Sci Adv. 2017 Jan 13;3(1):e1601386. doi: 10.1126/sciadv.1601386. eCollection 2017, Jan. PMID: 28097217

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