Gel propertiesofthreadfin bream(Nemipterus bleekeri) surimiaddedwith fish gelatinat
different levels(0–20% proteinsubstitution)incombinationwithmicrobialtransglutami-
nase (MTGase)atvariousconcentrations(0–1.2 unitsg−1 surimi)werestudied.Breaking
force anddeformationofsurimigeldecreasedwhenthelevelsof fish gelatinincreased
(po0.05). WhenMTGasewasincorporated,theincreasesinbreakingforceanddeformation
were obtainedinsurimigeladdedwith0–15% fish gelatin.Nevertheless,theadditionof
MTGase athigherlevelsledtothedecreaseinbothbreakingforceanddeformationof
surimi gelcontaining20% fish gelatin(po0.05). Additionof fish gelatincouldlowerthe
expressible moisturecontentofsurimigel.Bandintensityofmyosinheavychain(MHC)
and actinofsurimigeldecreasedwhen fish gelatinlevelsincreased,mainlyduetodilution
effect. Thecoarserandirregulargelstructurewasobtainedwhen fish gelatinwasadded.
The additionof1.2unitsMTGaseg−1 surimi decreasedMHCinsurimigelcontaining fish
gelatin slightly.