Abstract
A lectin was isolated from the nematode-trapping fungus Arthrobotrys oligospora. This carbohydrate-binding protein was developmentally regulated and was found only on trap-bearing mycelia. The lectin receptor on the surface of the nematode Panagrellus redivivus has, furthermore, been investigated using homogenates from whole nematodes or nematode cuticle. The ability of macromolecules from nematodes, fractionated according to Mr and lectin affinities, to inhibit the capture of nematodes by A. oligospora was tested using an inhibition assay, based on a simple dialysis membrane technique. One major lectin-binding glycoprotein, with apparent Mr of 65 000, was isolated from the nematode cuticle.
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