HETEROGENEITY OF ATLANTIC SALMON TROPONIN-I

Three non-identical, full length troponin-I (Tn-I) clones were isolate d from an Atlantic salmon myotomal (trunk) muscle cDNA library. The pr imary structures, which are predicted to range from 172 to 180 amino a cids in length, exhibit similar percent identity scores when compared with fast, slow and cardiac specific Tn-Is from higher vertebrates. Wh en the sequence data are considered along with the results of Western blotting it is evident that Tn-I is more heterogeneous in Atlantic sal mon than has been previously shown in higher vertebrates. (C) 1998 Els evier Science B.V. All rights reserved.