Hok/Sok Type I Toxin-Antitoxin Cassette
Codes for the Hok-Sok Type I toxin-antitoxin system. This system naturally evolved in bacteria as a method to maintain plasmids. Hok-Sok is noted for its presence on the R plasmid, which contains genes that confer antibiotic resistance. Hok-Sok is believed to be used to maintain these plasmids in the absence of antibiotic.
Epsilon Cyclase
Complete with a constitutive promotor, this fluorescent protein is expressed continuously throughout the cell. The half life of the protein is about 1 hour, as proteases have a high affinity for it.
