Investigations of the capacity of synthesizing 3β-sterols in mollusca—VI. The biosynthesis and composition of 3β-sterols in the neogastropods Purpura lapillus and Murex brandaris

Abstract

Abstract--1. It is shown that Purpura lapillus and Murex brandaris are capable of synthesizing sterols from mevalonate and acetate. The biosynthesis of sterols from acetate proceeds only at a slow rate. This phenomenon is compared with that observed in Natica cataena.2. The composition of the sterol mixtures of P. lapillus and M. brandaris is determined by means of gas-liquid chromatography.3. In both animals cholesterol is the principal sterol making up 77 and 59 per cent of the total sterols respectively. The sterol composition of Murex differs rather strongly from that of other prosobranchs.

Lipids: Their Distribution and Metabolism

“…Neogastropoda. No or hardly any radioactivity from [l-14 C]acetate was incorporated into the sterols of Buccinum undatum, N. antiqua, Purpura lapillus, and M. brandaris (Voogt, 1967b(Voogt, , 1972b. However, modification of the dietary sterols, as discussed already (Collignon-Thiennot et al, 1973), would suffice to explain the observed differences in sterol patterns.…”

Biosynthesis and composition of sterols and sterol esters in the land snail Cepaea nemoralis (L.) (gastropoda, pulmonata, stylommatophora)

“…Sterols were analyzed as their trimethylsilyl derivatives by gas-liquid chromatography on the stationary phases SE-30 (2%) and NPGS (2O/o) as described elsewhere (Voogt, 1972b).…”