2LLF:
reference: Gelsolin-like activation of villin: calcium sensitivity of the long helix in domain 6., Fedechkin SO, Brockerman J, Pfaff DA, Burns L, Webb T, Nelson A, Zhang F, Sabantsev AV, Melnikov AS, McKnight CJ, Smirnov SL, Biochemistry. 2013 Nov 12;52(45):7890-900. doi: 10.1021/bi400699s. Epub 2013 Oct , 29. PMID: 24070253

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