Crude protein values and amino acid profiles of some red algae collected from Çanakkale

Abstract

Present study consists the total protein values and amino acids components of the some red algae, collected from coastal zones of the Dardanelles and inland water. Crude proteins of samples were determined by the Kjeldahl method and were calculated using a nitrogen conversion factor of 6.25. Levels of amino acids were measured in algae samples using gas chromatography. Total protein contents were 36.72% in Batrachospermum gelatinosum (Linnaeus) De Candolle, 32.3% in Ceramium rubrum var. barbatum G. Feldmann-Mazoyer, 27.84% in Lemanea fluviatilis (Linnaeus) C. Agardh and 19.5% in Phyllophora crispa (Hudson) P.S. Dixon. In all, thirty two amino acids were identified and estimated. Analysis revealed the presence of eight free essential, nine free non essential and fifteen other amino acids. Aspartic acid was the major constituent in all the samples. Kinds and percentage of amino acids vary according to algae.