01342nas a2200145   4500008004100000245011500041210007000156260001200226300001200238490000700250520078800257100001501045700002001060856011601080       2000                        eng d00aThe chloroplast genome structure of the vascular plant Isoëtes is similar to that of the liverwort Marchantia0 achloroplast genome structure of the vascular plant Isoëtes is si  c2000///  a51 - 590 v903 aRestriction site mapping was used to characterize the chloroplast genome of the lycophyte, Isoëtes melanopoda. The Isoëtes chloroplast genome is approximately 139-145 kb in size with an inverted repeat of 12-13 kb. The gene content and consensus gene order are similar to that of Marchantia. A distinctive feature of the Isoëtes genome is an increased size of the small single copy (SSC) region possibly due to the insertion of a piece of DNA (3-8 kb) of unknown composition. The inferred insertion, along with a slightly larger inverted repeat, are responsible for the apparent size difference in the total genome relative to Marchantia. Patterns of restriction fragments were also consistent with the presence of a small inversion (2-3 kb) in the large single copy (LSC) region.1 aDuff, R.J.1 aSchilling, E.E.  uhttp://www.scopus.com/inward/record.url?eid=2-s2.0-9944243780&partnerID=40&md5=3fb650c66f2ac19a030f74b0002f62dd