... arginine by arginase, an important pathway to generate ornithine for synthesis of molecules such as polyamines for highly proliferative tissues (e.g. testis, embryos), and neurotransmitters such as glutamate for neural tissues, is an important evolutionary driving force for the expression of UTs...

.... The free amino acid,arginine, is abundant in fluids emitted by injured worms. Here, we demonstrate that arginine is a natural suppressant of TTX-stimulated larval escape behavior. Compared to a tapwater control, larvae initiated vigorous swimming in response to 10 –7 mol l –1 TTX. This excitatory response...

... here) to those of conspecific larvae (as studied previously). Bioassays were performed in mountain streams,testing responses of free-ranging adults to 13 individual l -amino acids. Relative to stream water (controls), adults turned immediately upcurrent and moved to the source of arginine, glycine...

...: Ecosystem Science and Management Program, University of Northern British Columbia, Prince George, BC, Canada V2N 4Z9 23 2 2004 © The Company of Biologists Limited 2004 2004 ornithine–urea cycle arginine urea nitrogen metabolism mitochondrial targeting Oncorhynchus mykiss...

...Larry P. Solomonson; Brenda R. Flam; Laura C. Pendleton; Bonnie L. Goodwin; Duane C. Eichler SUMMARY The enzyme endothelial nitric oxide synthase (eNOS) catalyzes the conversion of arginine, oxygen and NADPH to NO and citrulline. Previous results suggest an efficient, compartmentalized system...

... lysine uptake by approximately 50% and elicited a 2.5-fold accumulation over equilibrium levels. Arginine proved not to elicit above-equilibrium accumulations of lysine uptake, although it inhibited lysine uptake by about 50%. Fig. 5. (A) Inhibition of labeled alanine uptake at 6 s by test...

... two widely separated promotors. All three proteins facilitate the ion-independent transport of arginine, lysine and ornithine. Both mCAT-1 and mCAT-2 proteins have low amino acid sequence similarity but strikingly similar hydrophilicity profiles with amino acid antiporters, uniporters and symporters...

... . Barbul , A. ( 1990 ). Physiology and pharmacology of arginine . In Nitric Oxide from L-Arginine (ed. S. Moncada and E. Higgs) , pp. 317 – 329 . New York : Excerpta Medica . Baron , A. D. , Brechtel , G. , Wallance , P. and Edelman , S. ( 1988 ). Rates and tissue site...

... larval Manduca sexta midgut. Neutral amino acids (alanine, proline) are symported at higher rates as the vesicles are hyperpolarized. The symport rates of acidic (glutamate) and basic (arginine) amino acids are almost PD-independent. The half-saturation constant of alanine is PD-independent between −108...