6yms is a 1 chain structure with sequence from Geobacillus stearothermophilus. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
↑ Kubo M, Imanaka T. Cloning and nucleotide sequence of the highly thermostable neutral protease gene from Bacillus stearothermophilus. J Gen Microbiol. 1988 Jul;134(7):1883-92. PMID:3149972