title: Aldolase B in the liver of senescent rats.
abstract: The process of enzymatic aging was studied in livers of adult and senescent rats for aldolase B. No "cross-reacting material" was found in livers of 27 to 30-month-old rats, estimated by the ratio aldolase activity-antigen amount. The activity towards the two substrates of aldolase, fructose 1,6-diphosphate and fructose 1-phosphate did not vary in senescent animals. Moreover, other physico-chemical properties of the enzyme such as thermal inactivation, immunological reactivity and Michaelis constant remain unchanged. These results provide arguments against the occurrence of errors in protein synthesis as a cause of aging.
mesh_terms: D000375:Aging; D000818:Animals; D005260:Female; D005634:Fructose-Bisphosphate Aldolase / Q000378:metabolism*; D005779:Immunodiffusion; D007527:Isoenzymes / Q000378:metabolism; D007700:Kinetics; D008099:Liver / Q000201:enzymology* / Q000254:growth & development; D008297:Male; D011489:Protein Denaturation; D051381:Rats; D013696:Temperature
chemical_list: D007527:Isoenzymes; D005634:Fructose-Bisphosphate Aldolase