 Granulopoiesis, as well as the rest of haematopoiesis, begins from a haematopoietic stem cells.These are multipotent cells that reside in the bone marrow niche and have the ability to give rise to all heamatopoetic cells, as well as the ability of self renewal.They give rise to either a common lymphoid progenitor (CLP, a progenitor for all lymphoid cells) or a common myeloid progenitor, CMP, an oligopotent progenitor cell, that gives rise to the myeloid part of the heamatopoetic tree.