Item #: SCP-YYYY

Object Class: Safe

Special Containment Procedures: Experimentation on common chimpanzees has found that SCP-YYYY is benign. Resources should be focused on preventing the public's discovery of SCP-YYYY. This is difficult being that the human genome is publicly available; the likelihood of SCP-YYYY being recognized as anomalous by a civilian is still low.

MTF Rho-1 ("The Professors") will be assigned to any needed suppression of the discovery of SCP-YYYY by the scientific community. Supporting agents involved in the trusted scientific journal [REDACTED] will deny the publication of such a discovery.

Description: SCP-YYYY is a gene located in human chromosome 8 occurring in an estimated 64% of the world's population. The gene has not been proven to be expressed in its hosts: physically or behaviorally. When the sequence is converted to an analog signal, the result is 28 seconds (± 1 second) of a melody, designated as SCP-YYYY-1

SCP-YYYY-1 resembles a guitar riff. There is currently no supported theory as to how SCP-YYYY exists in preserved samples of humans who lived prior to the invention of the guitar or mandolin.

Foundation statisticians compared the song with records of copyrighted music using a consumer tool, ████ █████. This song has many similarities with common riffs, but is not an exact recording taken from a professional album nor is it a cover of a known song.

SCP-YYYY is occasionally found to be corrupted by mutations as a normal gene would. These mutations have a noticeable effect on the sound of SCP-YYYY-1.

Subjects born without SCP-YYYY will develop the gene when exposed to SCP-YYYY-1 with a near perfect chance of success. The mutation requires approximately 8 months to affect most human cells in the body. The rate of the spread of the mutation is widely varied depending on the subject's biochemical conditions. SCP-YYYY will be present in the majority of the subject's gametes 2 months after exposure to SCP-YYYY-1.

The infection begins with the temporal lobes producing a certain retrovirus, SCP-YYYY-2. The best data that can be drawn are correlations between the patterned firing of auditory neurons and the production of SCP-YYYY-2. SCP-YYYY-2 inserts SCP-YYYY into the host's genome.

Studying this infection requires dissecting the host's brain. As an alternative, conventional lab mice have been examined producing SCP-YYYY-2 when exposed to SCP-YYYY-1, however, SCP-YYYY-2 fails to alter their genome as it does to humans. Common chimpanzees are vulnerable to SCP-YYYY-1 yet have a lower rate of successful infection.

SCP-YYYY was first discovered by Gatsi ███ in 1959. Contemporaries completely ignored the finding. In 2001, the Foundation identified SCP-YYYY (without knowledge of ███‘s prior discovery) using modern DNA sequencing. Archives were cross-referenced and Gatsi ███‘s discovered was found.