Microtubule proteins and tubulin have been purified from brain and labeled with dichlorotriazinyl fluorescein (DTAF). This procedure compromises neither the polymerizability of the proteins nor their affinities for unlabeled proteins. Within 15 min after microinjection of either DTAF-microtubule proteins or DTAF-tubulin into cultured gerbil fibroma cells, there was an evolution of a fluorescent fibrillar pattern with a distribution similar to that of the microtubular network seen after staining with fluorescent antitubulin. These filaments were colchicine sensitive and could be seen to elongate with time. DTAF-labeled microtubule accessory proteins from brain were not incorporated into filaments and appeared to label autophagic vacuoles.
Article| January 01 1981
Direct visualization of fluorescein-labeled microtubules in vitro and in microinjected fibroblasts.
C H Keith
J R Feramisco
Online ISSN: 1540-8140
Print ISSN: 0021-9525
J Cell Biol (1981) 88 (1): 234–240.
C H Keith, J R Feramisco, M Shelanski; Direct visualization of fluorescein-labeled microtubules in vitro and in microinjected fibroblasts.. J Cell Biol 1 January 1981; 88 (1): 234–240. doi: https://doi.org/10.1083/jcb.88.1.234
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