Partial purification of pepsin from turkey proventriculus

In the present study, turkey proventriculus (stomach) was mixed with 10% NaCl (1:2 w/v) and extracted by centrifugation to produce crude extract. The partial purification of the extract was carried out by using Sephadex G-75 resin in gel filtration column chromatography. Crude extract (CE) and fractions obtained by gel filtration were analysed for milk-clotting activity (MCA), protein content, proteolytic activity (PA), and SDS-PAGE electrophoresis. The first 7 fractions did not have any activities; the fraction of 9, 10 and 11 had the most milk-clotting and proteolytic activities. Electrophoretic patterns proved that further purification steps should be applied for better results.