LRRC15 and osteosarcoma: We next characterized the binding of DUNP19 to LRRC15 across a wide array of cancer cell lines from a range of lineages including melanoma (RPMI7951), glioblastoma (U118MG) and osteosarcoma (HuO9, SAOS2), selecting cell lines based on LRRC15 gene expression data in publicly available databases: the EMBL-EBI expression atlas, Harmonizome 3.0, COSMIC, and the Cancer Cell Line Encyclopedia (CCLE) database.11 Despite selecting cell lines that exhibited high LRRC15 expression at the RNA level, not all were found to have detectable protein on the cell surface.