The project group B – Biological profiles – bundles projects with cell biological and preclinical orientation. One focus is the systematic characterization of matrix/cell interactions in complex systems. The focus is on cell types that enter into intensive matrix contacts during bone and skin regeneration, such as mesenchymal stem cells, osteoblasts, osteoclasts, osteocytes (TP B1, B2, B11), immunocompetent cells, keratinocytes, melanocytes and fibroblasts (TP B3, B4, B10).