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MAP kinase cascade. Word file containing an annotated Mathematica notebook.
Ref: Huang CY, Ferrell JE Jr. Ultrasensitivity in the mitogen-activated protein kinase cascade. Proc Natl Acad Sci U S A. 1996 Sep 17;93(19):10078-83. PubMed PMID: 8816754; PubMed Central PMCID: PMC38339.


Two-ODE and two-DDE models of the early embryonic cell cycle. Mathematica notebook.
Ref: Yang Q, Ferrell JE Jr. The Cdk1-APC/C cell cycle oscillator circuit functions as a time-delayed, ultrasensitive switch. Nat Cell Biol. 2013 May;15(5):519-25. doi:10.1038/ncb2737. Epub 2013 Apr 28. PubMed PMID: 23624406; PubMed Central PMCID: PMC3728279.