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  • Title: Encystment-Inducing Factor from Cultures of Acanthamoeba palestinensis: (Acanthamoeba palestinensis/growth/cyst formation/encystment-inducing factor).
    Author: Lasman M.
    Journal: Dev Growth Differ; 1987 Oct; 29(5):547-552. PubMed ID: 37282095.
    Abstract:
    Acanthamoeba palestinensis grown in monolayer cultures encysted almost synchronously at a stationary phase, with a yield of about 80% cysts. Under these growth conditions an encystmentinducing factor was released into the medium by transforming amoebae. Cell-free supernatants induced encystment of amoebae from early-log phase cultures. The not dialyzable encystment factor was resistant to nuclease, protease and trypsin digestion, as well as to boiling, but the activity was almost completely destroyed by autoclaving. Isolation and further characterization of the factor will enable clarification of the mode of its action as a regulator of amoeba-cyst transformation.
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