Felle H, Lühring H, Bentrup F W
Z Naturforsch C Biosci. 1979 Dec;34(12):1222-3.
The plasmalemma of thallus cells of the aquatic liverwort, Riccia fluitans, is reversibly depolarized by L- and D-serine. At 0.1 mM K+ in the medium, the depolarization saturates at 50 mV; half-maximal depolarization occurs at 13 microM L-serine and 30 microM D-serine, respectively. Uptake of 14C-labelled L-serine depends upon the K+ concentration and is sensitive to the membrane potential as indicated by its reduction through 1 mM sodium cyanide. We propose that serine binds to and is transported by an electrogenic carrier. However, an interaction of serine with K+ channels of the membrane seems also possible.
水生苔类植物浮苔（Riccia fluitans）叶状体细胞的质膜可被L-丝氨酸和D-丝氨酸可逆性去极化。在培养基中钾离子浓度为0.1 mM时，去极化在50 mV达到饱和；半最大去极化分别发生在13 μM的L-丝氨酸和30 μM的D-丝氨酸时。14C标记的L-丝氨酸的摄取取决于钾离子浓度，并且对膜电位敏感，如通过1 mM氰化钠使其降低所表明的那样。我们提出丝氨酸与一个生电载体结合并由其转运。然而，丝氨酸与膜的钾离子通道相互作用似乎也是可能的。
