Is it in any of the supplementary information or in any of the figure source data links in the paper? They do link in addition to the AWS open data this link (https://www.ebi.ac.uk/ena/data/search?query=PRJEB37264) - did you look through that? Other than that now idea - seems like a bit of an oversight from nature if they wouldn't make sure important sequences were readily available, you'd imagine they'd be important for peer review as well prior to publication.