HD Biosciences' proprietary technologies enable us to provide high-quality recombinant cell lines for various functional assays and for high throughput drug screening. Our cell lines with over expressed G-protein coupled receptor, ion channels or other drug targets provide solutions for drug discovery. The functional assays can be transcriptional readout (reporter gene assays) and/or intracellular calcium flux detection for GPCRs, and membrane potential dyes or calcium influx for certain ion channels. All HDB cell lines have been well-characterized and show stability in assays for at least 30 passages. (The Sample of Cell Line Product Description). All cell lines are available frozen at 2 x 106 cells/ml/vials and have been tested negative for mycoplasma.