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Table 3 Genomes with higher number of predicted M genes [23].

From: Geographic distribution of methyltransferases of Helicobacter pylori: evidence of human host population isolation and migration

Organism Genome size (Mbp) Total genes M genes % M Genesa) % GC Genomeb) % GC RM genesc)
Microcystis aeruginosa NIES-843 5.84 6312 51 0.81 42 40
Microcystis aeruginosa PCC 7806 ? ? 42 ? 42 40
Roseiflexus sp. RS-1 5.80 4517 38 0.83 60 58
Roseiflexus castenholzii DSM 13941 5.72 4330 36 0.83 60 56
Campylobacter upsaliensis RM3195 1.77 1998 34 1.70 34 34
Helicobacter pylori G27 1.65 1493 34 2.28 38 37
Helicobacter pylori HPAG1 1.60 1536 32 2.08 39 37
Helicobacter pylori Shi470 1.61 1569 32 2.04 38 36
Orientia tsutsugamushi Boryong 2.13 1182 31 2.62 30 28
Helicobacter acinonychis Sheeba 1.55 1612 29 1.80 38 35
Helicobacter pylori P12 1.67 1567 29 1.85 38 36
Cenarchaeum symbiosum 2.05 2017 28 1.39 57 52
Helicobacter pylori 26695 1.67 1576 28 1.78 39 36
Helicobacter pylori J99 1.64 1489 28 1.88 39 36
  1. a) percentage of M genes (M genes/total genes)
  2. b) percentage of GC content in the sequenced genome
  3. c) mean percentage of GC content among R-M system genes present within the genome