Nubas was a Furinax researcher at the Protoss Advance/Experimental Facility.
Biography
PAX research pushed the boundaries of protoss science and Nubas was sealed in a nutrient tank and experimented upon in order to unlock inherent genetic potential. However, his gene-key was missing a fundamental helix strand, resulting in his mutation and death.
Despite this, his legacy lived on when a sample of creep was brought to the facility. Due to a virus injected by the scientists, it became a "psionic predator", using their memories of Nubas against them. Some of the scientists believed Nubas experimented on himself, while others believed they forced the experiment on him.
References
Furman, Simon (w), Tomás Aira (p, i), German Erramouspe (i). "Creep." In StarCraft: Frontline: Volume 2 (paperback binding), pp. 26-67. Tokyopop, January 1, 2009. ISBN 1427-80831-7