MGP and cancer: Biochemistry; Cancer research; Cell biology; Molecular biology; Physiology; Stem cells research; Biomolecules; Molecular dynamics; Hematological system; Oncology; Matrix Gla protein (MGP), Bone morphogenetic protein-4 (BMP-4), BMP-2, Hematopoietic niche, Mediator transcriptional coregulatory complex.