NOMENCLATURE 



209 



erythrocytes, or to indicate the species from which the hemoglobin 

 has been isolated. 



As discussed in Chapter V, we shall use the prefix hemo to denote 

 both ferrous and ferric compounds, hemo for compounds of ferro- 

 porphyrin, and hemi for compounds of ferriporphyrin. This not 

 only obviates any possible confusion between reduced hemoglobin 

 and hemoglobin in the wider sense, comprising ferrous and ferric 

 compounds, but also that between "hemi-globin" (a globin of half 

 the usual molecular size; this may be termed "semiglobin") and 



TABLE I 

 Nomenclature of Hemoglobin Derivatives" 



Carboxyhemoglobin Carboxyhemoglobin 



Carbonmonoxy- 

 hemoglobin 



Ferric iron, Hem/globin 



native 



protein Hemiglobin 



Methemoglobin 



Ferrihemoglobin 



ivctroxide 



Alkaline 

 methemoglobin 



Ferrihemoglobin 

 hydroxide 



Hemoglobin cyanide Cyanmethemoglobin 



Ferrihemoglobin 

 c\anide 



Ferrous iron, (Denatured) globin Gl()l)in heniochromogen Denatured globin 

 denatured hemochrome ferroiiemoc-hromogen 

 protein 



(Denatured) glol)in Glol)in 



CO hemochrome CO honiochromogen 



Denatured gloljin 

 CO ferro- 

 heniociiromogen 



Ferric iron, (Denatured) globin Cilobin parahematin 

 denatured hemf'chronie 

 protein 



Denatured globin 

 ferrihemochromogen 



" The prefix "myo"' denotes derivatives of myc)hemogl()!)in, for example, myooxy- 

 hemoglobin. Derivatives in wiiich other hematins are present, are referred to as 

 niesooxyhenioglobin, etc. 



* Cf. Anson Vjo'), Heubner {lo-^T), Holden {IJIT). 



