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Table 2 Angiosperm plants tend to integrate pre-existing domains into multi-domain architectures

From: Evolutionary dynamics of protein domain architecture in plants

   lineages   overall
  angiosperm monocot dicot angiosperma
Single-domain 65 (46.7%) 51 (37.2%) 15 (30%) 1124771 (69.2%)e
Newly emerged/existing domainbc 33/32 11/40 12/3  
Multiple-domain 74 (53.3%) 86 (62.8%) 35 (70%) 55402 (30.8%)e
Newly emerged/existing domaind 15/59 4/82 8/27  
Chi-square testf 0.015 (p = 0.7) 16.49 (p < 0.001) 5.4 (p < 0.05)  
Chi-square test 26.16 (p < 0.001) 70.74 (p < 0.001) 10.91 (p < 0.001)  
Chi-square testh 23.75 (p < 0.001) 48.04 (p < 0.001) 72.09 (p < 0.001)  
  1. aIncludes the 3 monocot species, Os, Zm, and Sb, and the 4 dicot species, Vv, At, Pt, and Gm.
  2. bNew domains are defined as domains that are not present in algal and early diverging lineages. Pre-existing are domains that are present in algal and early diverging lineages.
  3. cIndicates the numbers of new and pre-existing domains in single-domain architectures in the three lineages examined.
  4. dIndicates the numbers of new and pre-existing domains in multiple-domain architectures in the three lineages examined.
  5. eDenotes the sum and percentage of single-domain and multiple-domain architectures collectively from all 7 angiosperm species.
  6. fChi-square values for the expected ratios of 50% newly emerged: 50% existing domains in multiple-domain architectures in single-domain architectures.
  7. gChi-square values for the expected ratios of 50% newly emerged: 50% existing domains in multiple-domain architectures.
  8. hChi-sqaure values for the expected ratio of 69.2% single-domain architectures: 30.8% multipl-domain architectures.