Wu C F, Pak W L
J Gen Physiol. 1975 Aug;66(2):149-68. doi: 10.1085/jgp.66.2.149.
Small potential fluctuations ("bumps"), boyh spontaneous and light induced, can be recorded intracellularly from the photoreceptors of Drosophila melanogaster. Statistical analyses of these bumps in the spectral range, 400-600 nm, lead to the following interpretations; (a) For weak stimuli at least, these bumps are the quantal units of the receptor potential. (b) Quanta of various wavelengths, when effectively absorbed, will elicit bumps of the same average size. (c) The spectral sensitivity of the receptor potential appears to have its origin in the relative efficiency of quantum bump production at different wavelengths, and not in the intrinsic difference in the properties of bumps produced by quanta of differenct wavelengths.
在果蝇的光感受器中,可以在细胞内记录到微小的电位波动(“脉冲”),包括自发的和光诱导的。对这些在400 - 600纳米光谱范围内的脉冲进行统计分析,得出以下解释:(a) 至少对于弱刺激而言,这些脉冲是感受器电位的量子单位。(b) 各种波长的量子在有效吸收时,会引发平均大小相同的脉冲。(c) 感受器电位的光谱敏感性似乎源于不同波长下量子脉冲产生的相对效率,而非不同波长量子产生的脉冲特性的内在差异。