Effect of niacin/nicotinamide deficiency on the diabetogenic effect of streptozotocin

Summary Weanling CD-1 mice were fed either a control diet or a diet deficient in niacin/nicotinamide for one month and then injected i.v. with 60, 80, 100, 120, 140, or 160 mg/kg streptozotocin. Mice on the deficient diet developed a higher incidence of diabetes and more severe hyperglycemia than those on the control diet.     

Lamprin: A new vertebrate protein comprising the major structural protein of adult lamprey cartilage

Summary Chemical analysis of lamprey cartilage showed that its major constituent was a newly defined structural protein termed lamprin. Amino acid analysis of lamprin revealed that it has a unique composition which is distinct from previously identified structural proteins.Acknowledgment. This work was supported by grants U0105 to G.M.W. and A5945 to J.H.Y. from the Natural Sciences and Engineering Research Council of Canada.     

The invasion and growth ofBabesia bovis in tick tissue culture

Summary Erythrocytic forms ofBabesia bovis inoculated into cell cultures of the tickBoophilus microplus invaded the tick cells and showed multiplication for up to 48 h after inoculation.Acknowledgment. We thank Mr. G.B. Mirre and Mrs M. Steinhoffer for able technical assistance during the course of the work. We also thank Dr. H.M.D. Hoyte, Parasitology Department, University of Queensland, for the use of an electron microscope. The work was supported by funds from the Australian Meat Research Committee.