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J. Biol. Chem., Vol. 255, Issue 7, 2919-2924, 04, 1980

Purification of lectin induced in the hemolymph of Sarcophaga peregrina larvae on injury

H Komano, D Mizuno and S Natori

A lectin was purified from the hemolymph of Sarcophaga peregrina larvae, obtained after injury of their body wall. This lectin agglutinated sheep red blood cells markedly and the hemagglutinating activity was inhibited by galactose and lactose. The active lectin was found to have a molecular weight of 190,000 and to consist of four alpha subunits and two beta subunits, with molecular weights of 32,000 and 30,000, respectively. During the early pupal stage, similar hemagglutinating activity in the hemolymph increased to several times than in larval hemolymph. This activity was completely inhibited by the antibody prepared against the lectin purified from the hemolymph of injured larvae. Thus, the same protein having lectin activity is apparently induced under two different physiological conditions: injury of the body wall of larvae and during pupation. The biological significance of this lectin is discussed.
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