Abbreviations used in this table:
Pos., the Escherichia coli reference sequence position number immediately prior to the intron; # Int., number of introns presently known at that position.
Intron Types: I, Group I Introns; II, Group II Introns; A, Archaeal Introns; S, Spliceosomal Introns; O, Other Introns (Not Group I, Group II, Archaeal, or Spliceosomal).
Phylogeny: A, Archaea; B, Bacteria; E, Eucarya.
Cell Location: C, Chloroplast; M, Mitochondrion; N, Nucleus.
Pos. # Int. Intron Type Phylogeny Cell Location
I II A S O A B E C M N
Pos. # Int. Intron Type Phylogeny Cell Location
I II A S O A B E C M N