Signos Thread
The Signos Thread is a genetic abnormity that is caused by an addition enzyme on the host's genetic coding that causes a near complete stop to cellular decay, and near perfection in DNA replication. Due to this a person who is affected by this abnormality will age vastly slower to those that are not effected. Also That person's body would tend to heal better than other of a similar age. This is due to the more efficient operations of the host body at the cellular level. Host of this genome normally have no ideal of its presence. The Signos Thread choosing mostly to stay dormant just before the onset of puberty (Around age 9 - 12 in humans)
Experimental treatment at removing the Signos Thread have so only lead to unbearable pain and rapid aging on the host has the host body tried to adapt and return to its true age and aging process.
In Theory the Signos Thread due to the stability it causes at the molecular level bases to allow for safer cloning techniques due to the resistance the Signos Thread has toward molecular decay.
The Signos Thread was first mentioned in the USS Rosenante Mission Personal Logs