Entry of L-Phenylalanine-C14 into Brain and Cerebrospinal Fluid.

Abstract
Summary There is a close resemblance of the time curves of phenylalamne-C14 in CSF and the acid soluble fractions of several regional brain areas in the anesthetized dog. This supports the view that in vivo studies of CSF provide information relevant to the entry of isotopically labelled amino acids into the brain.