“Utake … [3H]GABA (0.5 microM) was inhibited by beta‐guanidinopropionic acid (apparent KI, 28 microM), …‐alanine (KI, 55 microM), gamma‐amino‐beta‐hydroxybutyric acid (KI, 220 microM), beta‐amino‐n‐butyric acid (KI, 708 microM), 3‐aminopropanesulphonic acid (KI, 832 microM) and taurine (KI greater than 1 mM).”