National Center for Biotechnology Information NCBI NLM MEDLINE Mice gene expression regulation animals pubmed abstract nih national institutes of health national library of medicine research support non-u.s. gov't u.s. gov't P.H.S. Receptors Knockout skin / cytology organ culture techniques developmental* transcription factors / genetics proteins / genetics heterozygote cell surface / genetics bone morphogenetic protein receptors mesoderm / physiology* skin / metabolism skin / embryology transforming growth factor beta* pmid:10559902 doi:10.1038/11078 v a botchkarev n v botchkareva r paus bone morphogenetic protein 2 bone morphogenetic protein 4 bone morphogenetic proteins / genetics carrier proteins cell adhesion molecules / genetics hair follicle / embryology* keratins / genetics morphogenesis proteins / physiology* growth factor*