4Q8K:
reference: Molecular insight into the role of the N-terminal extension in the maturation, substrate recognition, and catalysis of a bacterial alginate lyase from polysaccharide lyase family 18., Dong S, Wei TD, Chen XL, Li CY, Wang P, Xie BB, Qin QL, Zhang XY, Pang XH, Zhou BC, Zhang YZ, J Biol Chem. 2014 Oct 24;289(43):29558-69. doi: 10.1074/jbc.M114.584573. Epub, 2014 Sep 10. PMID: 25210041

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