DNA sequencing of 18S rRNA gene of Cuora trifasciata Sequencing of ribosomal 18S rRNA gene from Panax pseudoginseng var. notoginseng Nuclear Ribosomal RNA Small Subunit (18S rRNA) Nucleotide Sequencing and Characterization of Sailonggu(Whole Bone of Myospalax baileyi Thomas) Diet composition of Difflugia tuberspinifera (testate amoeba) based on a clone library technique 18S rRNA gene variation and phylogenetic analysis among 6 orders of Bivalvia class