4QNL:
reference: Function of bacteriophage G7C esterase tailspike in host cell adsorption., Prokhorov NS, Riccio C, Zdorovenko EL, Shneider MM, Browning C, Knirel YA, Leiman PG, Letarov AV, Mol Microbiol. 2017 Aug;105(3):385-398. doi: 10.1111/mmi.13710. Epub 2017 Jun 19. PMID: 28513100

This OCA Structure page
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