title: [Protein fractions and their enzyme activity in rat myocardium after a 22-hour space flight].
abstract: No significant changes in the content of sarcoplasmatic and myofibrillar proteins were found in the myocardium of rats that made a 22-day flight onboard the biosatellite. On the 2nd and 26th postflight days the activity of aspartate and alanine aminotransferases of sarcoplasmatic proteins was increased and the total activity of lactate dehydrogenase and its isoenzyme spectrum remained unchanged. On the 2nd postflight day the ATPase activity of myosin of the myocardium was substantially lowered and on the 26th postflight day it returned to the normal. This decline in the ATPase activity of myosin can be regarded as an adaptive reaction to weightlessness.
mesh_terms: D000251:Adenosine Triphosphatases / Q000378:metabolism; D000410:Alanine Transaminase / Q000378:metabolism; D000818:Animals; D001219:Aspartate Aminotransferases / Q000378:metabolism; D007527:Isoenzymes; D007770:L-Lactate Dehydrogenase / Q000378:metabolism; D008297:Male; D009124:Muscle Proteins / Q000378:metabolism*; D009206:Myocardium / Q000201:enzymology / Q000378:metabolism*; D051381:Rats; D013026:Space Flight
chemical_list: D007527:Isoenzymes; D009124:Muscle Proteins; D007770:L-Lactate Dehydrogenase; D001219:Aspartate Aminotransferases; D000410:Alanine Transaminase; D000251:Adenosine Triphosphatases
vernacular_title: Belkovye fraktsii i ikh fermentativnaia aktivnost' v miokarde krys posle 22-sutochnogo kosmicheskogo poleta