6A5I:
reference: Structural characterization of PPTI, a kunitz-type protein from the venom of Pseudocerastes persicus., Banijamali SE, Amininasab M, Zaeifi D, PLoS One. 2019 Apr 11;14(4):e0214657. doi: 10.1371/journal.pone.0214657., eCollection 2019. PMID: 30973886

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