1UUP:
reference: Crystal structure of a dimeric form of streptococcal pyrogenic exotoxin A (SpeA1)., Baker MD, Gendlina I, Collins CM, Acharya KR, Protein Sci. 2004 Sep;13(9):2285-90. Epub 2004 Aug 4. PMID: 15295110

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