KANNO Y, LOEWENSTEIN W R
Science. 1964 Feb 28;143(3609):959-60. doi: 10.1126/science.143.3609.959.
Fluorescein-sodium, a fluorescent tracer whose molecular weight is 376, diffuses rather freely from the interior of one cell to another in a gland epithelium (Drosophila) but does not diffuse along the intercellular space to the exterior. The permeability of the junctional surfaces of the cell membranes appears to be high, in contrast to the nonjunctional surfaces and intercellular spaces which represent strong diffusion barriers.
荧光素钠是一种分子量为376的荧光示踪剂，在腺上皮（果蝇）中能相当自由地从一个细胞内部扩散到另一个细胞，但不会沿细胞间隙扩散到外部。与代表强扩散屏障的非连接表面和细胞间隙相比，细胞膜连接表面的通透性似乎很高。
