Klöppel R, Höfer M
Arch Microbiol. 1976 Apr 1;107(3):329-34. doi: 10.1007/BF00425348.
The obligate aerobic yeast Rhodoturula gracilis was found to take up the alditols D-glucitol, D-mannitol, ribitol, xylitol, D-arabinitol, L-arabinitol and erythritol by means of a constitutive mobile membrane carrier. This uptake involved active transport, that is, it was dependent on the supply of metabolic energy, leading to the accumulation of alditols inside the cells. The accumulation ratio (intracellular concentration to extracellular concentration, Si/SO) was much lower for alditols than for monosaccharides. As for monosaccharides, this ratio decreased with increasing extracellular concentration, even to values below 1. The kinetic data showed that the carrier system for alditols was identical to that for monosaccharides, though it had a much lower affinity and maximum velocity for alditols. Hence the uptake of alditols was blocked in the presence of monosaccharides. Only ribitol and L-arabinitol were catabolized following enzyme induction. The other alditols were not broken down.
人们发现专性需氧酵母纤细红酵母通过一种组成型移动膜载体摄取糖醇类物质，如D - 葡萄糖醇、D - 甘露醇、核糖醇、木糖醇、D - 阿拉伯糖醇、L - 阿拉伯糖醇和赤藓糖醇。这种摄取涉及主动运输，也就是说，它依赖于代谢能量的供应，导致糖醇在细胞内积累。糖醇的积累率（细胞内浓度与细胞外浓度之比，Si/SO）比单糖的积累率低得多。对于单糖来说，这个比例随着细胞外浓度的增加而降低，甚至降至1以下的值。动力学数据表明，糖醇的载体系统与单糖的载体系统相同，尽管它对糖醇的亲和力和最大速度要低得多。因此，在单糖存在的情况下，糖醇的摄取被阻断。只有核糖醇和L - 阿拉伯糖醇在酶诱导后被分解代谢。其他糖醇则不被分解。
