5Y48:
reference: Binding and structural studies of the complexes of type 1 ribosome inactivating protein from Momordica balsamina with uracil and uridine., Pandey SN, Iqbal N, Singh PK, Rastogi N, Kaur P, Sharma S, Singh TP, Proteins. 2019 Feb;87(2):99-109. doi: 10.1002/prot.25584. Epub 2018 Nov 5. PMID: 30007053

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