Table 2.
Nidovirus virion-associated proteins (kDa)
| Protein | Coronavirusa | Torovirusa | Arterivirusa | Okavirusa | |
|---|---|---|---|---|---|
| Spike glycoprotein | S | 180–220 | 200 | – | – |
| Major surface glycoprotein | GP5 | – | – | 30–45 | – |
| Minor surface glycoprotein | GP2 | – | – | 25 | – |
| GP3 | 36–42 | – | |||
| GP4 | – | – | 15–28 | – | |
| Large spike glycoprotein | Gp116 | – | – | – | 110–135 |
| Small spike glycoprotein | Gp64 | – | – | – | 60–65 |
| Membrane protein | M | 23–35 | 27 | 16 | |
| Nucleocapsid protein | N | 50–60 | 19 | 12 | 20–22 |
| Small envelope protein | E | 9–12 | – | 9 | – |
| Hemagglutinin-esterase protein | HE | 65 | 65 | – | – |
a
apparent molecular weight estimated by SDS-PAGE electrophoresis (kDa)