THE NITROGENOUS METABOLISM OF THE EARTHWORM (LUMBRICUS TERRESTRIS)

The nitrogenous metabolism of the earthworm (Lumbricus terrestris).

Ceramide glycanase from the earthworm, Lumbricus terrestris.

Ceramide glycanase (CGase) is an enzyme that cleaves the linkage between the sugar chain and the ceramide. To make this enzyme readily available, we have developed a simple method for preparing it from the earthworm, Lumbricus terrestris. The method involves Bio-Gel A-0.5m, octyl-Sepharose and p-aminophenylthiogalactoside-agarose column chromatography. By gel filtration, the molecular mass of e...

Scaling of the hydrostatic skeleton in the earthworm Lumbricus terrestris.

The structural and functional consequences of changes in size or scale have been well studied in animals with rigid skeletons, but relatively little is known about scale effects in animals with hydrostatic skeletons. We used glycol methacrylate histology and microscopy to examine the scaling of mechanically important morphological features of the earthworm Lumbricus terrestris over an ontogenet...

Ontogenetic scaling of burrowing forces in the earthworm Lumbricus terrestris.

In hydrostatic skeletons, it is the internal fluid under pressure surrounded by a body wall in tension (rather than a rigid lever) that enables the stiffening of the organism, the antagonism of muscles and the transmission of force from the muscles to the environment. This study examined the ontogenetic effects of body size on force production by an organism supported with a hydrostatic skeleto...

The nitrogenous metabolism of the earthworm (Lumbricus terrestric). II. Arginase and urea synthesis.

Negligible amounts of urea were excreted by fresh’ earthworms &urnbricus terrestris) ; however, on fasting, the quantity of urea in the excreta increased.notably (1). The oral administration of arginine was followed by an increased elimination of urea. The excretion of urea was also augmented, to a lesser extent, by the ingestion of citrulline with certain other amino acids. The data presented ...