Transport of [3H]taurine Days Vmax (fmol/106cells) Kt (μM) Control 5d 5.02 ± 0.63 0.06 ± 0.01 5 nM TPEN 5d 3.10 ± 0.20 * 0.03 ± 0.01 * Vmax and Kt were calculated by Lineweaver-Burk linearization. Each value is the mean ± SEM, n = 4. * P < 0.05 with respect to Control

Table 1: Effect of io administration 5 nM of N,N,N,N-tetrakis-(2-pyridylmethyl) ethylenediamine (TPEN) on [3H]taurine transport in isolated cells from rat retinal after 5 days of injection