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| Field | Value |
| Title | Studies on phenolase enzymes in prawns - I.The distribution and physical properties of phenolase in penaeid prawns |
| Names |
Antony, P.D.
Nair, M.R. Nair, M.R. |
| Date Issued | 1969 (iso8601) |
| Abstract | Weighed portions of head, shell, tail and muscle of the species (i) Metapenaeus affinis, (ii) M. dobsoni, (iii) M. monoceros, (iv) Penaeus indicus and (v) Parapenaeopsis stylifera were blended with 2 parts water, centrifuged at 0 degrees C and diluted. Relative dopa oxidase activities of head juices, assessed by the technique of Bailey et al. were: (i), 702.4; (ii), 80.9; (iii), 520.3; (iv), 400.0; (v), 70.6. Phenolase activity varied with size of the prawns; for (iv), ranges of relative activity were: catecholase, 154-820; tyrosinase, 73-310. Dopase activity was greatest in the head, followed by tail, shell and muscle in descending order of activity. Activity of dopa oxidase was highest at pH 6.4-7.6 and 50-55 degrees C. The enzyme is stable at pH>7; at acid pH, activity is rapidly reduced. |
| Genre | Article |
| Topic | prawns |
| Identifier | Fishery Technology1969:5(1), 31-36 |