Schematic of SP7 functions in chondrocytes, osteoblasts, and osteocytes. SP7 regulates osteoblast differentiation and bone formation through osteoblast target genes by recognizing AT-rich region. In osteocytes, SP7 regulates osteocyte maturation and intracortical remodeling through osteocyte target genes by recognizing TGA(G/T) TCA motif. SP7 also regulates chondrocyte differentiation and endochondral ossification. CC, chondrocyte; OB, osteoblast; Ocy, osteocyte; OC, osteoclast. Part of the figure were drawn by using pictures from Servier Medical Art. Servier Medical Art by Servier is licensed under a Creative Commons Attribution 3.0 Unported License (https://creativecommons.org/licenses/by/3.0/)