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        In situ immunodetection of 5-methylc

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        In situ immunodetection of 5-methylcytosine (5-mC) on squashed cells using anti-methylcytosine

        Cross-references are to Schwarzacher & Heslop-Harrison 2000. Practical in situ Hybridization. Bios, Oxford. 216+xii pp . Available from Sigma Chemical

        1) Prepare chromosomes as for in situ hybridization (Chapter 5 in situ book)

        2) Slides are pre-treated with RNase and pepsin (Protocol 8.1 in situ book without paraformaldehyde treatment)

        3) Ethanol dehydrate the slides and air dry

        4) Block slides in PBST + 1% BSA for 20 min at RT

        5) Incubate slides in monoclonal anti-5-mC (1:1000 dilution in PBS) for 1h at 37℃ in a humid chamber

        6) Wash in PBST 2x5min

        7) Incubate slides in Biotin anti-mouse IgG (1:500 dilution in PBST) for 1h at 37℃ in a humid chamber

        8) Wash in PBST 2x5min

        9) Incubate slides in streptavidin Cy3 (1:300 dilution in PBST) for 1h at 37℃ in a humid chamber

        10) Wash in PBST 2x5min

        11) DAPI stain and mount (Protocol 9.3 in situ book)

        Solutions:

        PBS (see Appendix 1 in situ book)

        PBST: add 0.03% (v/v) Tween 20 to the 1xPBS

        See Castilho et al. J. Cell Sci. 2000 (on Publication page)

        Pat Heslop-Harrison

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