IGEM:MIT/2005/Definitions

cytokine an intercellular chemical messenger protein (eg, tumor necrosis factor, interleukin) released by white blood cells. Cytokines facilitate communication among immune system cells and between immune system cells and the rest of the body.

EGF receptor epidermal growth factor recpetor, (a dimerizing cell surface receptor, but epidermal doesn't sound very yeastial) egf

hapten a part of an antigene

hematopoietic an agent or process that affects or promotes the formation of blood cells.