OBIKA M, BAGNARA J T
Science. 1964 Jan 31;143(3605):485-7. doi: 10.1126/science.143.3605.485.
Extracts of brightly colored skins from nine amphibian species were analyzed chromatographically. In yellow skin in which xanthophores predominated, relatively large quantities of sepiapterin were found, while in red skin which was laden with erythrophores, three drosopterins were most prevalent. Frozen sections of skin indicated that pteridines were present within chromatophores, either alone or accompanied by carotenoids. It is concluded that sepiapterin and three drosopterins are utilized as pigments in amphibians and it is suggested that other less brightly colored pteridines also function in this respect. It no longer seems proper to make the tacit assumption that bright pigmentation of amphibians is due only to the presence of carotenoids.
对9种两栖动物色彩鲜艳的皮肤提取物进行了色谱分析。在以黄色素细胞为主的黄色皮肤中，发现了相对大量的蝶啶，而在富含红色素细胞的红色皮肤中，三种果蝇蝶呤最为普遍。皮肤的冰冻切片表明，蝶啶单独或与类胡萝卜素一起存在于色素细胞中。得出的结论是，蝶啶和三种果蝇蝶呤被用作两栖动物的色素，并且有人提出其他颜色不太鲜艳的蝶啶在这方面也起作用。认为两栖动物鲜艳的色素沉着仅归因于类胡萝卜素的存在这种默认假设似乎不再恰当。
