6B7L:
reference: A bacterial immunomodulatory protein with lipocalin-like domains facilitates host-bacteria mutualism in larval zebrafish., Rolig AS, Sweeney EG, Kaye LE, DeSantis MD, Perkins A, Banse AV, Hamilton MK, Guillemin K, Elife. 2018 Nov 6;7. pii: 37172. doi: 10.7554/eLife.37172. PMID: 30398151

This OCA Structure page
uses Jmol, developed by the Jmol Development Team (documentation).