Fig. 4
From: Synchronous birth is a dominant pattern in receptor-ligand evolution
Spatial representation of the Multiple Correspondence Analysis. a Represents the pairs colored according to their categories of time of appearance (before in black, same branch in red, after in blue). b and c Represent the two traits which present the greatest influence on the results. b represents the distribution of the partners according to their molecular weight in dalton. Small: < 550 Da, Medium: 550 to 25,000 Da, Big: > 25,000 Da. c Represents the distribution of the type of molecule. Group 9 (red) are the “other proteins”, corresponding the free proteins as neuropeptides and not glycoprotein hormones, group 1, 1.5, 2, 3, 5, 7, 8 contain the amines, monoamines, catecholamines, lipids and derivatives, nucleotids and derivatives, the esters and the gaba. Group 4 contains the glycoproteins and group 6 (blue) the scleroproteins