The preparation, structural and steady-state kinetic characteristics of contractile proteins from the leg muscle of frogs Rana temporaria and Rana pipiens are described. Actin and myosin from the two frog species are indistinguishable. The proteins have structural and steady-state kinetic properties similar to those from rabbit fast-twitch skeletal muscle. Chymotrypsin digestion of frog myosin ...

We describe a new species of cascade frog of the genus Rana, from west Malaysia. Rana monjerai, new species is a medium-sized frog of the subgenus Odorrana (SVL of males, 38-43 mm; of one female, 75 mm), and is distinguished from all other members of this subgenus by the combination of: white lip stripe, dorsolateral fold, full web on the fourth toe, vomerine teeth, gular vocal pouch and relati...

one of the possible threats in increasing use of nanomaterials is the emergence of toxicity in humans and other animals which is discussed in nanotoxicology. in addition to toxic effects of nanomaterials themselves, different chemical precursors which are usually used in bottom-up approaches for production of nanomaterials may have secondary toxic effects in living organisms. in contrast, less ...