2.7.4.14	22000	-	x * 22000	
2.7.4.14	22222	-	x * 22222, calculation from nucleotide sequence	
2.7.4.14	22448	-	x * 22448, mass spectroscopy, calculation from nucleotide sequence	
2.7.4.14	22500	-	sucrose density gradient centrifugation	
2.7.4.14	26000	-	gel filtration