Conversion of one or more amino acids in eukaryotic peptides to the D-enantiomer configuration is catalyzed by specific L/D-peptide isomerases and it is a poorly investigated post-translational modification. No common modified amino acid or specific modified position has been recognized, and mechanisms underlying changes in the peptide function provided by this conversion are not widely studied...

Phenoloxidase (Po) activity was measusred spectrophotometrically in serum, plasma and haemocytes (HLS) of the freshwater crayfish (Pontastacus leptodactylus). The highest activity was found in HLS suggesting that the haemocytes are the major source of the Po or its proform prophenoloxidase (proPO) in crayfish. Furthermore, the enzyme activity in serum samples was reduced after freezing the samp...

A sixty-day feeding trial was conducted to investigate the effect of dietary effective microorganisms (EM) Bokashi on organ histology, growth performance, and survival rate freshwater crayfish Pontastacus leptodactylus (Eschscholtz, 1823). serum powder consisted two major as Bacillus amyloliquefaciens spp. plantarum Lactobacillus plantarum. Four treatment groups were established in control (wit...

The narrow-clawed crayfish ( Pontastacus leptodactylus ) is one of the most ecologically and economically important freshwater species in Turkey. However, harvest this has declined from 7937 t 1984 to 696 2019. One primary reasons for decrease stock use fishing gears with poor size selectivity. In study, new codend designs were investigated improve selectivity fyke nets P. . Seven codends three...

Phenoloxidase (Po) activity was measusred spectrophotometrically in serum, plasma and haemocytes (HLS) of the freshwater crayfish (Pontastacus leptodactylus). The highest activity was found in HLS suggesting that the haemocytes are the major source of the Po or its proform prophenoloxidase (proPO) in crayfish. Furthermore, the enzyme activity in serum samples was reduced after freezing the samp...