Effect of sciatectomy and induced ammonia stress on Mg2+- adenosine triphosphatase activity in frog tissues.

Mg2 + dependent —adenosine triphosphatase activity has been studied in the muscle, brain, kidney and liver tissues of frog, Rana hexadactyla (Lesson) after sciatectomy and induced chronic ammonia stress. The enzyme activity decreased in the tissues of the denervated frog. The activity of the enzyme increased in all the tissues of the normal and denervated frogs except in the denervated muscle when ammonium lactate was infused intraperitoneally.