Spores and prothallia of the fernAnemia phyllitidisL. Sw. contain a protein which in its physicochemical properties corresponds largely to calmodulin. It shows immunoreactivity with a calmodulin antiserum and activates bovine brain phosphodiesterase. Its content increases during the early processes of light-induced spore germination, indicating that the Ca2+-dependence of these processes may be mediated by this protein.
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