This project made use of bioinformatic mining of microsatellites from genomic resources to identify simple sequence repeats(SSRs),or microsatellites.A bioinformatic analysis of 304 nucleotide sequences in Siniperca chuatsi GenBank identified 22 sequences containing 30 microsatellites,account for 9.87% of wholly GenBank database.Cluster analysis indicated that 16 dinucleotide pairs were the most abundant microsatellites,accounting for 53.33% of the total microsatellite-containing sequences;11 trinucleotide repeats and 3 tetranucleotide repeats were found in these microsatellite sequences,accounting for 36.66% and 10.01% respective.17 primer pairs were designed from these microsatellite sequences.Among the 17 primer pairs,13 pairs have amplified products,6 pairs can achieve clear PCR products by Electrophoresis.Genotype analysis results indicated that:the average polymorphism information contents(PIC)were 0.692(ranged:0.567-0.806),were all polymorphic loci.
Inorganic lead （Pb） is one of the most common environmental pollutants. Much evidence indicates that Pb exposure could directly affect fish growth and development. In this study, we investigated the cytotoxic effects of Pb on cytoskeletal protein stability at both protein and mRNA level in crucian carp Carassius auratus. Pb（NO3）2 treatment in concentration of 100 μmol/L resulted in decreased expression of both α- and β-tubulin but γ-tubulin as assayed with SDS-PAGE, Western Blot, and ELISA. In vivo and in vitro analyses on protein expression of tubulins are consistent. The effect of Pb on mRNA expression varied among different tissues. Our results suggest that cytotoxicity of Pb at protein translation level is stronger than at mRNA expression level.
