SOME ASPECTS OF BIOCHEMICAL DIVERSITY 



295 



The positions of the a and ^ bands in the spectrum of the oxyhaemo- 

 globins are also different : in the AnneHds the two bands are shifted 

 towards the violet end of the spectrum relative to the positions in the 

 Vertebrates. Conversely, in the Holothuria the two bands are shifted 

 towards the red end. 



The isoelectric points of the various haemoglobins also show differences 

 (see Table XV). 



Table XV 



Isoelectric points of haemoglobins 



(see Florkin, 1948) 



As can be seen from the Table, vertebrate haemoglobin has an iso- 

 electric point around neutrality and differing from that of other types of 

 haemoglobin whose isoelectric points are more acid. 



The diversity' in the molecular weights of a series of haemoglobins is 

 illustrated by Table XVI. 



Table XVI 

 The molecular weights of haemoglobins 



(see Wyman, 1948) 



