Abstract
ABSTRACT The apoLp‐III in the adult hemolymph of Artogeia rapae can associate reversibly with lipophorin. The apoLp‐III was purified from the adult and larval hemolymph by KBr density gradient ultracentrifugation, gel permeation chromatography anion exchange chromatography and preparative electrophoresis (Prep Cell). ApoLp‐I, ApoLp‐II and apoLp‐III have the molecular weights of 212 kDa, 80 kDa respectively. N‐terminal sequence of apoLp‐III were determined. The N‐terminal amino acid sequence of apoLp‐III shows 50‐57% identity with those of other lepidopteran insects. apoLp‐III has the antibacterial activity. Injection of bacteria increase the concentration of apoLp‐III in the hemolymph, indicating that apoLp‐III plays a role in insect immunity. Immunological analysis was also investigated with the anti‐apoLp‐III.
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