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The growth response of a lecithin-deficient strain of Neurospora crassa to equimolar supplements of either choline or glycerophosphorylcholine is essentially the same. This is in contrast to the negligible stimulatory effect of phos-phorylcholine on growth of the same organism. The results of enzymatic and growth-response studies with Neurospora suggest that glycerophosphorylcholine is available to the organism without prior hydrolysis by enzymes released into the culture medium.
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Crocken et al. (1963) studied this question.
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