haemhemen.

Brit.

/hiːm/, U.S.

/him/

Etymology: Back-formation < hæm- (in haemoglobin n.).

a. A chelation compound, C₃₄H₃₂O₄N₄Fe, of ferrous ion and protoporphyrin, obtained on reduction of hæmatin: the red-coloured non-protein constituent of hæmoglobin.

ΘΚΠ

the world > life > the body > vascular system > blood > components of blood > blood corpuscle or plate > [noun] > red cells or corpuscles > haemoglobin > forms or parts of

globulin1831

haematosin1834

haemato-crystallin1865

oxyhaemoglobin1869

methaemoglobin1870

globin1872

haematogen1890

methaemoglobulin1890

haemagglutinin1904

haem1925

hypertensinogen1941

angiotensinogen1958

1925 Anson & Mirsky in Jrnl. Physiol. 60 50 Haemoglobin is a conjugated protein consisting of globin and a non-protein part, containing pyrrol nuclei and iron, which we shall call haem.

1939 Jrnl. Biol. Chem. 131 661 Coryell..has applied the Pauling equation..to the oxidation of hemoglobin..and has shown that interaction among the four heme groups will account for the occurrence of an n which is not integral.

1956 Nature 11 Feb. 275/1 The angular variation of the g values enables an accurate determination to be made of the orientation of the hæm and porphyrin planes with respect to the external crystalline axes.

1956 Nature 11 Feb. 275/2 Detailed information on the orientation of the hæm planes can be combined with X-ray measurements to calculate the polypeptide chain directions.

1970 R. W. McGilvery Biochemistry ii. 13 The biological function of hemoglobin is therefore derived from both the heme and the peptides... Each of the four peptide chains has its own heme.

b. Any of various compounds of a ferrous or ferric ion and a porphyrin, present in biological pigments.

ΘΚΠ

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

haem1948

1948 Biochem. Jrnl. 42 p. xlvii/2 The phase separation of haems has been applied to ox heart muscle.

1962 Rimington & Kennedy in Florkin & Mason Comprehensive Biochem. IV. xii. 563 By far the most important metalloporphyrins..are the iron complexes or hemes. In these nature has exploited the valency change from the ferric to ferrous state and vice versa to establish an electron transport system connecting the intracellular dehydrogenases with atmospheric oxygen.

1966 K. Okunuki in Florkin & Stotz Comprehensive Biochem. XIV. 233 Four types of haem have so far been known to occur in cytochromes... These are haem a, protohaem, haem c and so-called haem a₂.

This entry has not yet been fully updated (first published 1976; most recently modified version published online March 2022).

单词	haem
释义	haemhemen. Brit. /hiːm/, U.S. /him/ Etymology: Back-formation < hæm- (in haemoglobin n.). a. A chelation compound, C₃₄H₃₂O₄N₄Fe, of ferrous ion and protoporphyrin, obtained on reduction of hæmatin: the red-coloured non-protein constituent of hæmoglobin. ΘΚΠ the world > life > the body > vascular system > blood > components of blood > blood corpuscle or plate > [noun] > red cells or corpuscles > haemoglobin > forms or parts of globulin1831 haematosin1834 haemato-crystallin1865 oxyhaemoglobin1869 methaemoglobin1870 globin1872 haematogen1890 methaemoglobulin1890 haemagglutinin1904 haem1925 hypertensinogen1941 angiotensinogen1958 1925 Anson & Mirsky in Jrnl. Physiol. 60 50 Haemoglobin is a conjugated protein consisting of globin and a non-protein part, containing pyrrol nuclei and iron, which we shall call haem. 1939 Jrnl. Biol. Chem. 131 661 Coryell..has applied the Pauling equation..to the oxidation of hemoglobin..and has shown that interaction among the four heme groups will account for the occurrence of an n which is not integral. 1956 Nature 11 Feb. 275/1 The angular variation of the g values enables an accurate determination to be made of the orientation of the hæm and porphyrin planes with respect to the external crystalline axes. 1956 Nature 11 Feb. 275/2 Detailed information on the orientation of the hæm planes can be combined with X-ray measurements to calculate the polypeptide chain directions. 1970 R. W. McGilvery Biochemistry ii. 13 The biological function of hemoglobin is therefore derived from both the heme and the peptides... Each of the four peptide chains has its own heme. b. Any of various compounds of a ferrous or ferric ion and a porphyrin, present in biological pigments. ΘΚΠ the world > life > biology > substance > pigment > [noun] > human or animal pigments > constituents of haem1948 1948 Biochem. Jrnl. 42 p. xlvii/2 The phase separation of haems has been applied to ox heart muscle. 1962 Rimington & Kennedy in Florkin & Mason Comprehensive Biochem. IV. xii. 563 By far the most important metalloporphyrins..are the iron complexes or hemes. In these nature has exploited the valency change from the ferric to ferrous state and vice versa to establish an electron transport system connecting the intracellular dehydrogenases with atmospheric oxygen. 1966 K. Okunuki in Florkin & Stotz Comprehensive Biochem. XIV. 233 Four types of haem have so far been known to occur in cytochromes... These are haem a, protohaem, haem c and so-called haem a₂. This entry has not yet been fully updated (first published 1976; most recently modified version published online March 2022). < n.1925
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