PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 9103461-4 1997 However, after permeabilizing these cells with saponin, a strong positive intracellular staining for gC1qR was observed by FACS, fluorescence microscopy on coverslips, and confocal laser scanning microscopic analysis. Saponins 47-54 complement C1q binding protein Homo sapiens 101-106