<b>Fluorescent labelling of endoplasmic reticulum (ER).</b> Cells transduced with this premade lentivirus (Cat. No. 0025VCT) will express a fusion protein consisting of mCherry fluorescent protein; the ER targeting sequence of calreticulin, which is fused at the 5' end; and the sequence encoding the ER retrieval sequence, KDEL, which is fused at the 3' end.