"A novel, non-canonical mechanism of regulation of MST3 (mammalian Sterile20-related kinase 3)" (Biochemical Journal, 2012) - This provides a comprehensive overview of the regulation of the 431 and 443 amino acid isoforms.
Are you researching the or the cryptographic system ? "A novel, non-canonical mechanism of regulation of MST3
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"A note on the security of MST3" (Cryptology ePrint Archive, 2009) - Discusses the security of the scheme. "A novel, non-canonical mechanism of regulation of MST3
Based on your request, there are two primary areas of research for "MST3," depending on whether you are interested in biology or cryptography.