Gel purification of rHaa86
The Ni–NTA purified rHaa86 was eluted from 8 % nonreducing
polyacrylamide gels. The gel slices were mixed
thoroughly with PBS, pH 7.4 containing cocktail of protease
inhibitors and incubated the mixture over night at 4 C on
magnetic stirrer. The targeted protein was collected from the
supernatant by centrifugation at 15,000 rpm for 30 min at
4 C. The eluted protein was checked by SDS-PAGE. The
concentration of eluted protein was estimated by Fluorometer
(Cubett, Invitrogen, USA) and stored at -20 C. This
gel purified protein was used for in vitro antigenic stimulation
of lymphocytes in blood culture.