2.2. Methods
2.2.1. Sarcoplasmic protein (SP) preparation
Frozen fish fillets were allowed to thaw in the cold room overnight
before homogenizing with 3 volumes of de-ionizedwater (DIwater)
in a blender for 2 min. The homogenate was centrifuged at
1000 g for 15 min before supernatant collection. This process was
repeated once more. The collected supernatant (SP solution) was
used to determine for its patterns using sodium dodecyl sulfate gel
electrophoresis (SDS-PAGE) and the left solutionwas kept overnight
in the freezer (70 C) before lyophilizing using a freeze-dryer
(IlShin Lab. Gyeonggi-do, South Korea). The obtained powder was
used as SP powder sample. The protein content in the SP powder
was estimated by Kjeldahl method according to AOAC (2000) procedure.
The protein content was about 74.4 0.22 g/100 g sample.
The same batch of SP preparation was used throughout the
experiment.