-l, A lectin fraction has been isolated from mucus produced by the snail Helix aspersa by affinity chromatography of mucus protein on Sephadex G-100. The lectin is eluted with D-glucose. It agglutinates rabbit red blood cells but not human type A and is inhibited by o-GalNAc and to a lesser extent o-GlcNAc and D-Gal. 2. The anti-A agglutinin of the Helix albumin gland was isolated by the same m...

We created a single-compartment computer model of a CO(2) chemosensory neuron using differential equations adapted from the Hodgkin-Huxley model and measurements of currents in CO(2) chemosensory neurons from Helix aspersa. We incorporated into the model two inward currents, a sodium current and a calcium current, three outward potassium currents, an A-type current (I(KA)), a delayed rectifier ...

Oxygen-transporting protein of the hemolimph of snails Helix aspersa maxima (HaH) was converted from being an oxygen carrier to a form which exhibited phenoloxidase activity by incubation with sodium dodecyl sulfate (SDS). On treatment with 1.73 mM SDS, for 3 min, significant increase of catalytic efficiency of hemocyanin towards substrate catechol (kcat/Km = 34.56 mM.min -1 versus kcat/Km = 0....

Because oviposition in the land snail Helix aspersa is a metabolically expensive process coupled to a high fixed cost, one expects oviposition to occur only when the clutch size surpasses a minimum value at which the reproductive benefit exceeds the cost. We propose that neural innervation of the gonad allows H. aspersa to monitor oocyte production and ensure an adequate supply of gametes prior...

1. The only cytoplasmic inclusions visible in the living neurone are lipid globules and mitochondria. 2. In both Helix and Limnaea there are three kinds of lipid globules, as follows: (a) large globules, yellowish from their carotinoid content; (6) smaller globules, easily coloured by vital dyes; (c) small globules, not colourable by vital dyes. 3. The crescents and rings ('dictyosomes') seen i...