CD300c protein, also known as CMRF35 antigen, was identified using a monoclonal antibody. It is present on immune cells like monocytes, neutrophils, and certain T and B lymphocytes, as documented by Jackson et al. in 1992. The protein is broadly expressed in various tissues, including the lung, appendix, and 19 other tissues. CD300c Protein, Human (HEK293, His) is the recombinant human-derived CD300c protein, expressed by HEK293 , with C-His labeled tag.