Distribution of delta-aminolevulinic acid synthetase and delta-aminolevulinic acid dehydratase in liver and kidney of rainbow trout (Salmo gairdnerii) |
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| Authors: | R F Addison D Fitzpatrick K W Renton |
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| Institution: | Department of Fisheries and Oceans, Bedford Institute of Oceanography, Dartmouth, N.S., Canada. |
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| Abstract: | 1. Activities of delta-aminolevulinic acid synthetase (ALA-S) and delta-aminolevulinic acid dehydratase (ALA-D) in trout liver and kidney were compared with those in the mouse. 2. ALA-S activity (per unit tissue fresh weight) exceeded ALA-D activity in trout liver and kidney. 3. In trout kidney, ALA-S activity slightly exceeded, and ALA-D activity far exceeded, their activities in trout liver. 4. In trout, heme synthesis differs from that in mammals in that appreciable synthesis occurs in the kidney, and in that ALA-S activity is not rate limiting. |
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