passages.id: split_8_test_3137_passage
passages.type: progene_text
passages.text: Time - lapse fluorescence microscopy of stably transfected SW13 cell lines synthesizing fluorescent human keratin 8 and 18 chimeras HK8 - CFP and HK18 - YFP revealed extended filament networks that are entirely composed of transgene products and exhibit the same dynamic features as keratin systems in epithelial cells .