melanogenn.

Brit.

/mᵻˈlanədʒ(ə)n/, U.S.

/məˈlænədʒ(ə)n/,

/məˈlænəˌdʒɛn/

Origin: A borrowing from German. Etymon: German Melanogen.

Etymology: < German Melanogen (R. von Jaksch 1889, in Zeitschr. f. physiol. Chem. 13 385) < melano- melano- comb. form + -gen -gen comb. form.

Biochemistry and Physiology.

Any of various (usually colourless) precursors of melanin.

ΚΠ

1890 J. Cagney tr. R. von Jaksch Clin. Diagnosis vii. 248 The urine of persons suffering from pigmented tumours sometimes contains a substance to which the name of melanin has been given, but of which the chemical constitution is not yet sufficiently established... The body in question is not melanin, but a chromogen—melanogen—analogous to that which precedes the formation of urobilin.

1902 C. Watson Encycl. Medica XI. 183 This pale or colourless pre-melanin (melanogen).

1949 Arch. Pathol. 47 212 Ehrlich's reaction is a test not for melanin but only for melanogen.

1998 Jrnl. Photochem. & Photobiol. B. 47 140/1 These results suggest that trans-AMCHA decreases melanocyte tyrosinase activity by suppressing the production of..UV-induced melanogens.

This entry has been updated (OED Third Edition, June 2001; most recently modified version published online March 2022).

单词	melanogen
释义	melanogenn. Brit. /mᵻˈlanədʒ(ə)n/, U.S. /məˈlænədʒ(ə)n/, /məˈlænəˌdʒɛn/ Origin: A borrowing from German. Etymon: German Melanogen. Etymology: < German Melanogen (R. von Jaksch 1889, in Zeitschr. f. physiol. Chem. 13 385) < melano- melano- comb. form + -gen -gen comb. form. Biochemistry and Physiology. Any of various (usually colourless) precursors of melanin. ΚΠ 1890 J. Cagney tr. R. von Jaksch Clin. Diagnosis vii. 248 The urine of persons suffering from pigmented tumours sometimes contains a substance to which the name of melanin has been given, but of which the chemical constitution is not yet sufficiently established... The body in question is not melanin, but a chromogen—melanogen—analogous to that which precedes the formation of urobilin. 1902 C. Watson Encycl. Medica XI. 183 This pale or colourless pre-melanin (melanogen). 1949 Arch. Pathol. 47 212 Ehrlich's reaction is a test not for melanin but only for melanogen. 1998 Jrnl. Photochem. & Photobiol. B. 47 140/1 These results suggest that trans-AMCHA decreases melanocyte tyrosinase activity by suppressing the production of..UV-induced melanogens. This entry has been updated (OED Third Edition, June 2001; most recently modified version published online March 2022). < n.1890
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