The epigenetic code is hypothesized to be a defining code in every eukaryotic cell consisting of the specific epigenetic modification in each cell. It consists of histone modifications defined by the histone code and additional epigenetic modifications such as DNA methylation. The base for the epigenetic code is a system above the genetic code of a single cell, called epigenetics. While in one individual the genetic code in each cell is the same, the epigentic code is tissue and cell specific. "The genetic code is the piano, the epigenetic code the tune."