In 1944, Taurog et al. (1) pointed out that practically all of the phospholipides in plasma of man and dog contain choline. This indicates that the plasma phospholipides of these two species consist almost entirely of lecithins and sphingomyelins. Confirmation of this finding has now come from Hack (2) and from Sinclair (3-5). The former reported that about 95 per cent of the phospholipides in ...
