5UG7:
reference: Perforin proteostasis is regulated through its C2 domain: supra-physiological cell death mediated by T431D-perforin., Brennan AJ, Law RHP, Conroy PJ, Noori T, Lukoyanova N, Saibil H, Yagita H, Ciccone A, Verschoor S, Whisstock JC, Trapani JA, Voskoboinik I, Cell Death Differ. 2018 Feb 7. pii: 10.1038/s41418-018-0057-z. doi:, 10.1038/s41418-018-0057-z. PMID: 29416110

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