Methods Mol Biol 2009 Jan 01;518:57-66. doi: 10.1007/978-1-59745-202-1_5.

Combining microinjection and immunoblotting to analyze MAP kinase phosphorylation in single starfish oocytes and eggs.

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The starfish oocyte has proven useful for studies involving microinjection because it is relatively large (190 mum) and optically clear. These oocytes are easily obtained from the ovary arrested at prophase of meiosis I, making them useful as a model system for the study of cell cycle-related events. In this chapter, a method for combining microinjection with immunoblotting of single cells is described. Individual starfish oocytes are injected, removed from the microinjection chamber, and analyzed by immunoblotting for the dual-phosphorylated form of mitogen-activated protein kinase (MAPK). This method will allow for experiments testing the regulation of MAPK in single cells and for the manipulation of these cells by a quantitative microinjection technique.

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Genes referenced: LOC115919910 LOC115925415 LOC586799