1BK7:
reference: Crystal structure of a ribonuclease from the seeds of bitter gourd (Momordica charantia) at 1.75 A resolution., Nakagawa A, Tanaka I, Sakai R, Nakashima T, Funatsu G, Kimura M, Biochim Biophys Acta 1999 Aug 17;1433(1-2):253-60. PMID: 10446375

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