title: Arthropod ribosomes. Integrity of ribosomal ribonucleic acids from aphids and water fleas.
abstract: The 28 S aphid rRNA differs from those of the other insects in two points: (1) it lacks the primary nick; (2) it is larger by 0.2 - 106 daltons. The 28 S rRNA from water fleas also, like that from crayfish, is larger than those from comon insects by 0.2 - 106 daltons. These crustacean 28-S rRNAs were shown to contain the primary nick, which is probably not located in the central point. The 18-S rRNAs from aphids and water fleas had molecular weights significantly larger than 0.7 - 106, the common vaalue for the eukaryotic 18 S rRNA. It was was suggested that the 3'-terminal base sequences of these RNAs are different from the common sequences of these RNAs are different from the common sequence proposed for the 18 S rRNAA of eukaryotes. These exceptional characteristics of the rRNAs from the parthenogenetic animals may provide a probe for general functions of the rRNA in the eukaryotic ribosomes.
mesh_terms: D000818:Animals; D001042:Aphids / Q000378:metabolism*; D003400:Astacoidea / Q000378:metabolism*; D004591:Electrophoresis, Polyacrylamide Gel; D007915:Lepidoptera / Q000378:metabolism*; D008970:Molecular Weight; D009036:Moths / Q000378:metabolism*; D012335:RNA, Ribosomal / Q000378:metabolism; D012265:Ribonucleotides / Q000032:analysis; D005423:Siphonaptera / Q000378:metabolism*; D013045:Species Specificity
chemical_list: D012335:RNA, Ribosomal; D012265:Ribonucleotides