porphyropsinn.

Brit.

/ˌpɔːfᵻˈrɒpsɪn/, U.S.

/ˌpɔrfəˈrɑps(ə)n/

Origin: Formed within English, by compounding. Etymons: porphyro- comb. form, rhodopsin n.

Etymology: < porphyro- comb. form + -opsin (in rhodopsin n.). Compare later opsin n.

Biochemistry.

Any of a class of light-sensitive pigments found in the retinas of freshwater vertebrates, analogous to rhodopsin in humans but differing from it in containing the aldehyde of vitamin A ₂ rather than that of A₁ and in having a maximum absorption of visible light at a slightly longer wavelength.

ΘΚΠ

the world > life > biology > substance > pigment > [noun] > human or animal pigments > others

urohaematin1863

respiratory pigment1877

stercobilin1880

oxyluciferin1919

wear-and tear-pigment1928

photopigment1937

porphyropsin1937

erythrolabe1958

cryptochrome1978

1937 G. Wald in Nature 12 June 1017/1 The visual purple of freshwater fishes possesses different spectral properties. I shall refer to it as porphyropsin.

1962 K. F. Lagler et al. Ichthyol. xi. 376 The retinas of fishes yield two kinds of light-sensitive pigments, rhodopsin and porphyropsin.

1993 Visual Neurosci. 10 193 The fraction of visual pigment that is porphyropsin appears to be uniform throughout individual retinular cells.

This entry has been updated (OED Third Edition, December 2006; most recently modified version published online March 2022).

单词	porphyropsin
释义	porphyropsinn. Brit. /ˌpɔːfᵻˈrɒpsɪn/, U.S. /ˌpɔrfəˈrɑps(ə)n/ Origin: Formed within English, by compounding. Etymons: porphyro- comb. form, rhodopsin n. Etymology: < porphyro- comb. form + -opsin (in rhodopsin n.). Compare later opsin n. Biochemistry. Any of a class of light-sensitive pigments found in the retinas of freshwater vertebrates, analogous to rhodopsin in humans but differing from it in containing the aldehyde of vitamin A ₂ rather than that of A₁ and in having a maximum absorption of visible light at a slightly longer wavelength. ΘΚΠ the world > life > biology > substance > pigment > [noun] > human or animal pigments > others urohaematin1863 respiratory pigment1877 stercobilin1880 oxyluciferin1919 wear-and tear-pigment1928 photopigment1937 porphyropsin1937 erythrolabe1958 cryptochrome1978 1937 G. Wald in Nature 12 June 1017/1 The visual purple of freshwater fishes possesses different spectral properties. I shall refer to it as porphyropsin. 1962 K. F. Lagler et al. Ichthyol. xi. 376 The retinas of fishes yield two kinds of light-sensitive pigments, rhodopsin and porphyropsin. 1993 Visual Neurosci. 10 193 The fraction of visual pigment that is porphyropsin appears to be uniform throughout individual retinular cells. This entry has been updated (OED Third Edition, December 2006; most recently modified version published online March 2022). < n.1937
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