 EF2 kinase – Blocks phosphorylation of elongation factor 2 thus blocking protein synthesis.Glucocorticoid regulation – A common route for phenoptosis is breakdown of glucocorticoid regulation and inhibition, leading to massive excess of these corticosteroids in the body.Robert Sapolsky discusses phenoptosis in his book "Why Zebras Don't Get Ulcers", 3rd Ed., p. 245-247.