Action | Type I | Type II | Type III |
---|---|---|---|
Spacer acquisition | Cas1/Cas2 | Cas1/Cas2/Csn1/Cas9 | Cas1/Cas2 |
Pre-cRNAprocessing | Cas6 or Cas5 | Rnase III | Cas6 |
Interference Complex members | Cascade | tracrRNA/Cas9 | Csm/Cmr |
Secondary processing | None | 5′ end cleavage | 3′ end cleavage |
Interference Subtubes | I-A, I-B, I-E, I-F, I-C, | II-A, II-B, II-C | III-A, III-B |