Regenerative Protein D

Overview
Regenerative Protein D (henceforth referred to as RP-D) is a synthetic protein developed by Sovereign R&D, a research and development firm under the control of its parent company, Sovereign Security Services. Sovereign developed the protein in the search for bleeding edge biotechnology to give them an advantage on the battlefield over the raiders and rival firms they encounter on a regular basis.

Origin
RP-D was developed as part of Project Renegade, a military R&D project aiming to produce super soldiers via means other than augmentation.

Dr. Vertasky discovered the protein after a series of experiments on Lekgolo genetic material.

Purpose
The protein allows Lekgolo to make use of organic combat drugs similar to adrenaline in humans without over-exerting themselves. However, unlike human limiters, which protect humans from physiological damage by limiting strength output, RP-D simply regenerates damage dealt by over-exertion, metabolising any available energy sources to do so.

Although the protein alone has no effect on humans, when combined with Rumbledrugs, the protein goes to work repairing the damage dealt by the excessive feats of strength that Rumbledrug users can perform. Thus, combining RP-D and various Rumbledrugs and combat stimulants allows soldiers to perform superhuman feats without causing their own death.