4MN0:
reference: Spatial structure of the novel light-sensitive photoprotein berovin from the ctenophore Beroe abyssicola in the Ca(2+)-loaded apoprotein conformation state., Stepanyuk GA, Liu ZJ, Burakova LP, Lee J, Rose J, Vysotski ES, Wang BC, Biochim Biophys Acta. 2013 Oct;1834(10):2139-46. doi:, 10.1016/j.bbapap.2013.07.006. Epub 2013 Jul 25. PMID: 23891746

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