Haemoglobin, abbreviatit Hb or Hgb, is the airn-containin oxygen-transport metalloprotein in the reid bluid cells o aw vertebrates[1] (wi the exception o the fish faimily Channichthyidae[2]) as well as the tissues o some invertebrates.

(heterotetramer, (αβ)2)
1GZX Haemoglobin.png
Structur o human haemoglobin. The proteins α an β subunits are in reid an blue, an the airn-containin haem groups in green. From PDB: 1GZX  Proteopedia Hemoglobin
Protein teep metalloprotein, globulin
Function oxygen-transport
Cofactor(s) haem (4)
Gene Chromosomal
Hb-α1 HBA1 Chr. 16 p13.3
Hb-α2 HBA2 Chr. 16 p13.3
Hb-β HBB Chr. 11 p15.5


  1. Maton, Anthea; Jean Hopkins; Charles William McLaughlin; Susan Johnson; Maryanna Quon Warner; David LaHart; Jill D. Wright (1993). Human Biology and Health. Englewood Cliffs, New Jersey, USA: Prentice Hall. ISBN 0-13-981176-1.
  2. Sidell, Bruce; Kristin O'Brien (2006). "When bad things happen to good fish: the loss of hemoglobin and myoglobin expression in Antarctic icefishes". The Journal of Experimental Biology. 209 (Pt 10): 1791–1802. doi:10.1242/jeb.02091. PMID 16651546.