1YBK:
reference: Favourable mediation of crystal contacts by cocoamidopropylbetaine (CAPB)., Ozbek S, Muller JF, Figgemeier E, Stetefeld J, Acta Crystallogr D Biol Crystallogr 2005 Apr;61(Pt 4):477-80. Epub 2005, Mar 24. PMID: 15805603

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