Photoregeneration and Sensitivity Control of Photoreceptors of Invertebrates
Photoregeneration and Sensitivity Control of Photoreceptors of Invertebrates
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无脊椎动物光感受器的光再生和敏感性控制
DOI：
10.1007/978-3-642-85769-0_18
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发表时间：
1973
期刊：
影响因子：
3.5
通讯作者：
J. Schwemer
中科院分区：
文献类型：
--
作者：
K. Hamdorf;R. Paulsen;J. Schwemer
众所周知，头足类动物的变视紫红质是热稳定的，并且可光还原为视紫红质（图1）。在章鱼物种Eledone moschata中，视紫红质（R）和酸性变紫质（M）的波长最大值相隔约50 nm。由于波长最大值之间的距离较大，该R-M系统非常适合光动力学研究（1-3）。单色照明引起R（11-cis R.，isoR）及其酸M.这种平衡完全取决于两种颜料的吸收系数之比。在等吸光点处的照明产生50%的R和50%的M。在440 nm处获得最小R浓度（38%）。在较长的波长下，M定量地再转换为R。
It is a well known fact that the metarhodopsins of cephalopods are thermostable and photoreconvertible into rhodopsin (Fig. 1). In the octopus species Eledone moschata the wavelength maxima of the rhodopsin (R) and acid metarhodopsin (M) are separated by about 50 nm. Due to the large distance between the wavelength maxima, this R-M-system is well suited for photokinetic studies (1–3). Monochromatic illumination causes a photoequilibrium between R (11-cis R., isoR) and its acid M. The equilibrium is determined solely by the ratio betweeen the absorption coefficients of the two pigments. Illumination at the isosbestic point yields 50% R and 50% M. Minimal R-concentration (38%) is obtained at 440 nm. At longer wavelength the M is quantitatively reconverted to R.