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Table 1 Sources and general characteristics of the organismal datasets used

From: Gain and loss of polyadenylation signals during evolution of green algae

Organism Source No of ESTs or mRNAs No sequences analyzed1) nt composition2)
Chlorophyta     
Acetabularia Genbank 1002 28 A 36.3%
     C 9.5%
     G 19.6%
     U 37.6%
Chlamydomonas TIGR 31608 10508 A 21.2%
     G 30,9%
     C 24,8%
     U 23,1%
Helicosporidium Genbank 1229 359 A 21.1%
     C 26,6%
     G 29,0%
     U 23,3%
Prototheca Genbank 5906 292 A 20.3%
     C 31.2%
     G 28.5%
     U 20.0%
Pyramimonas this study 5034 1260 A 24.2%
     C 21.5%
     G 23.3%
     U 27.0%
Scenedesmus Genbank 6016 265 A 20.1%
     C 23.8%
     G 31.2%
     U 24.9%
Scherffelia dubia [26], and this study 1032 110 A 25.7%
     C 26.0%
     G 26.8%
     U 21.5%
Ulva linza Genbank 1888 54 A 22.3%
     C 22.3%
     G 28.6%
     U 26.8%
Streptophyta     
Closterium Genbank 1201 136 A 3.6%
     C 27.6%
     G 33.3%
     U 35.5%
Coleochaete this study 5094 142 A 27.2%
     C 18,9%
     G 22,6%
     U 31,3%
Klebsormidium this study 4651 473 A 27.8%
     C 20.5%
     G 25.6%
     U 26.1%
Mesostigma [18] 10395 1327 A 26.9%
     C 20.6%
     G 23.1%
     U 29.4%
  1. 1) No of non-redundant sequences with a poly(A)-tail analyzed, 2) within 200 nt upstream from the CS.