Table 3.

Summary of N-glycosylation of p24 family proteins

Name	N-X-S/T	Cells	PNGase F sensitive	Endo H sensitive	NA sensitive	Type of N-glycosylation
p23	N179	HeLa	No	No	No	None
p24		HeLa	No	No	No	None
GMP25	N104	HeLa Rat liver	Yes Yes	Yes Yes	No Yes	High mannose Complex (−4,−3,−5,−2)
p26		HeLa	No	No	No	None
gp27	N90	HeLa	Yes	No	Yes	Complex (−1,0)
		Rat liver	Yes	No	Yes	Complex (−5,−6,−4)

Compared with HeLa cells, gp27 and GMP25 are apparently cycling more extensively in rat liver, and both glycoproteins are modified by sialic acid. Still, gp27 is more extensively modified than GMP25. Charged isoforms are listed in order of their relative abundance.