Table 3. Distribution of phosphorylation sites (PhS) in constitutive (CDS con) and alternative sequences located in the core (cCDS alt) or terminal (5grey alt, 5grey dual, 3grey alt, 3grey dual) coding regions of polymorphic gene loci.

	cCDS con	cCDS alt	5grey alt	5grey dual	3grey alt	3grey dual
# PhS	15 353	1 851	1 908	929	3 777	805
# #Seq with PhS	3 452	562	462	288	892	269
#Seq total	11 354	6 040	3 698	2 437	4 369	1 826
Densitya	1.31	1.006	0.979	0.950	1.171	1.027

^aThe PhS density was calculated for the total lengths of the sequences found in the Human Protein reference database (www.hprd.org).