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SDS-PAGE analysis of spore–crystal mixture of Bt strains. M Genei Protein marker (Higher Range #105977). Lanes 1–2 reference strain HD1 and 4Q7. Lanes 3–6 reference strains of parasporin (PS4, PS3, PS2 and PS1). Lanes 7–13 Bt isolates, T6, T37, T68, T461, T165, T186 and T98
