The visual pigments of a deep-sea myctophid fish Myctophum nitidulum Garman;: an HPLC and spectroscopic description of a non-paired rhodopsin-porphyropsin system
The visual pigments of a deep-sea myctophid fish Myctophum nitidulum Garman;: an HPLC and spectroscopic description of a non-paired rhodopsin-porphyropsin system
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DOI：
10.1111/j.1095-8649.2007.01772.x
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发表时间：
2008-03-01
影响因子：
2
通讯作者：
Douglas, R. H.
中科院分区：
文献类型：
--
作者：
Hasegawa, E. I.;Sawada, K.;Douglas, R. H.
Unusually for a deep-sea fish, the retina of the myctophid (lanternfish) Myctophum nitidulum was found to contain two visual pigments, shown by extract spectrophotometry to be maximally sensitive at 468 and 522 nm, respectively, giving this species one of the broadest spectral ranges of all deep-sea fishes. High performance liquid chromatography (HPLC) indicated that the retina contained both A(1)- and A(2)-based chromophores. Surprisingly, the maximum absorbance (lambda(max)) values of the two visual pigments were too far apart to form a rhodopsin-porphyropsin 'pigment pair', suggesting they were based on distinct opsins each linked to a different chromophore. This might be an adaptation to the detection of both long-wave bioluminescence and residual shorter-wave surface illumination, and could be related to this animal's tendency to migrate towards surface waters at night. (c) 2008 The Authors Journal compilation (c) 2008 The Fisheries Society of the British Isles.
