Fig. 4.

Purification of the CoVSH1 glycoprotein. (A) Protein content of fractions recovered from low pH elution of an anti-flag M2-antibody column (see Section 2). A 10% SDS-PAGE of the indicated fraction number, with the arrow pointing to the CoVSH1 protein. Size and migration of molecular weight markers are indicated. (B) SDS-PAGE of treated (right) and untreated (left) CoVSH1 glycoprotein. (C) SDS-PAGE of the indicated fraction number recovered from an ion exchange mono Q column (see Section 2).