Phospholipase a and lysophospholipase activities in isolated fat cells: Effect of cyclic 3'.5'-AMP
Publication date
1972-04
Authors
Chiappe de Cingolani, G.E.
Bosch, H. van den
Deenen, L.L.M. van
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Article
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Abstract
1. 1. Homogenates of fat cells, isolated from rat epididymal fat pads, were shown to contain phospholipase A and lysophospholipase activities.
2. 2. The highest phospholipase A activity was found at pH 8, but a separate optimum of lower activity was detected at about pH 5.
3. 3. By using I-[9,10-3H2]palmityl-2-[I-14C]Iinoleyl-glycero-3-phosphoryletha-nolamine it could be demonstrated that fatty acid ester linkages at both position 1 and 2 of the phosphatidylethanolamine were hydrolyzed at pH 8.
4. 4. Lipolysis at both positions of the phosphoglyceride was stimulated by cyclic 3',5'-AMP.