From: Evolution and thermodynamics of the slow unfolding of hyperstable monomeric proteins
 | Archaea | Bacteria |
---|---|---|
Type 1 RNase HI | Sto; Sulfolobus tokodaii (hyperthermophile)a | Ec; Escherichia coli (mesophile) |
 |  | Tt; Thermus thermophilus (thermophile) |
Type 2 RNase HII | Tk; Thermococcus kodakaraensis (hyperthermophile) | Aa; Aquifex aeolicus (hyperthermophile)a |
 |  | Tm; Thermotoga maritima (hyperthermophile)a |