Explain Relative Quantitative difference of Protein Taxonomy

This analysis involves the study between the amounts of different proteins and more significantly, of different constituent amino acids of the protein in different-animals.

An example of how quantitative analysis helps in solving taxonomic problem can be seen in birds (Fig 8.13). Here the phylogenetic relationships among the various orders

            Figure: Probable phylogenetic presentation in birds on the bnsis of the sites of synthesis of L-aseorbic acid; In few both in liver and kldney. In some only fiver, and  most incapable of.

are worked out on the basis of quantitative analysis of ascorbic acid which in some birds is produced in the kidney, in some in the liver, in some in both liver and kidney, and in others in neither. The analysis of this by taxonomists indicated that the ancestral enzyme systems involved occurred first in kidney, were later transferred to the liver and finally lost completely in some of the more evolved passerine birds.