| structure and evolution of the leucine plasmids carried by the endosymbiont (buchnera aphidicola) from aphids of the family aphididae. | in all examined species of the family aphididae, the bacterial endosymbiont buchnera aphidicola carries a plasmid encoding the genes leuabcd (involved in leucine biosynthesis) along with repa1, repa2 and orf1. the gene organisation of the leucine plasmids was conserved, except in buchnera isolated from pterocomma populeum, where orf1 was located in a different position. an inverted repeat (lir1) located between repa2 and leua is found in all of the buchnera leucine plasmids examined. the predict ... | 1998 | 9812361 |