Human Mesenchymal Bone Marrow Stem Cell Culture Extra-cellular Expansion Matrix Human Mesenchymal Bone Marrow Stem Cell Culture Extra-cellular Expansion Matrix is essential for Expansion of Human Mesenchymal Bone Marrow Stem Cell Cultures. This product requires Human Mesenchymal Bone Marrow Stem Cell Culture Media Cat#M36094-21 and Cells Cat# 36094-21.