viral budding viral budding from endoplasmic reticulum membrane viral budding from ER membrane virus budding from ER membrane by viral capsid envelopment endoplasmic reticulum membrane viral budding during viral capsid envelopment biological_process virus budding from ER membrane during viral capsid envelopment virus budding from ER membrane ER membrane viral budding during viral capsid envelopment GO:0046764 GO:0046751 endoplasmic reticulum membrane viral budding GO:0046762 A viral budding that starts with formation of a membrane curvature in the host ER membrane. viral budding from ER membrane during viral capsid envelopment viral budding from ER membrane by viral capsid envelopment ER membrane viral budding