Abstract
The transport of hypotaurine, the precursor of the probable neuromodulator taurine, was investigated using mouse brain synaptosomal preparations. Hypotaurine uptake was concentrative, energy- and Na-dependent and strongly inhibited by GABA, L-DABA (L-2,4-diaminobutyric acid) and .beta.-alanine, suggesting interactions with GABA uptake systems. The uptake consisted of only 1 saturable transport component both in adult and in 6-day-old brain, being more efficient in the latter.