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https://www.worldpressphoto.org/collection/photo-contest/2013/stephan-vanfleteren/10 2013 Stephan Vanfleteren PSS1-JL | World Press Photo 2013 Stephan Vanfleteren PSS1-JL stephan vanfleterenworld press2013pss1jl https://www.ncbi.nlm.nih.gov/Structure/pdb/6PTK 6PTK: Crystal structure of the sulfatase PsS1_NC C84A with bound sulfate ion exo-2S-iota carrageenan S1 sulfatase1,2-ETHANEDIOL3,6-anhydro-D-galactose4-O-sulfo-beta-D-galactopyranoseCALCIUM IONGLYCEROLSULFATE ION