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5 protocols using csu 10 scanner head

1

Fluorescent Embryo Imaging Protocol

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Dechorionated, formaldehyde-fixed, methanol-devittellinized embryos were fluorescently stained using standard methods (see Supplemental Experimental Procedures for a list of antibodies used). Embryos were mounted in 70% glycerol/PBS. Fluorescent mRNA in situ hybridization was performed as described, with digoxigenin labeled probe (Santiago et al., 2014 (link)). fra antisense probe was transcribed from linearized cDNA cloned into pBluescript. Fluorescence quantification was performed as described (Santiago et al., 2014 (link)). Images were acquired using a spinning disk confocal system (Perkin Elmer) built on a Nikon Ti-U inverted microscope using a Nikon OFN25 60× objective with a Hamamatsu C10600-10B CCD camera and Yokogawa CSU-10 scanner head with Volocity imaging software. Max projections were generated, cropped and processed using ImageJ.
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2

Fluorescent Staining of Drosophila Embryos

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Dechorionated, formaldehyde-fixed, methanol devitellinized embryos were fluorescently stained as previously described (Bashaw, 2010b ). Live-dissected embryos were stained as previously described (Bashaw, 2010a ). The following primary antibodies were used: mouse anti-1D4/FasII [Developmental Studies Hybridoma Bank (DSHB); 1:100], mouse anti-Beta gal [DSHB; 1:150], mouse anti-Robo [DSHB; 1:50], mouse anti-Myc [DSHB (9E10); 1:500] rabbit anti-GFP [Invitrogen #A11122); 1:500], mouse mAb anti-V5 [Serotec; 1:200], Mouse anti-HA [Covance (16B12) 1:250], Mouse anti-Sema2a [DSHB 1:10], Alexa647-conjugated goat anti-HRP [1:500, Jackson Immunoresearch (#123-605-021); 1:500]. Cyanine 3-conjugated goat anti-rabbit [Jackson; 1:1000], Alexa488-conjugated goat anti-mouse [Molecular Probes; 1:500] were used as secondary antibodies. Images were acquired using a spinning disk confocal system (PerkinElmer) built on a Nikon Ti-U inverted microscope using a Nikon OFN25 60X or 40X objective with a Hamamatsu C10600-10B CCD camera and Yokogawa CSU-10 scanner head with Volocity imaging software. Images were processed using ImageJ.
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3

Embryo Fixation and Confocal Imaging

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Embryo fixation and staining were performed as described (Kidd et al., 1998 (link)). Images were acquired with Volocity using a spinning disk confocal (Perkin Elmer) using a Nikon 40x objective with a Hamamatsu C10600-10B CCD camera and Yokogawa CSU-10 scanner head. Images were processed using ImageJ.
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4

Fluorescence Quantification in Drosophila Embryos

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Phenotypes were analyzed and images were acquired using a spinning disk confocal system (Perkin Elmer) built on a Nikon Ti-U inverted microscope using a Nikon OFN25 60x 40x or 10x objective with a Hamamatsu C10600-10B CCD camera and Yokogawa CSU-10 scanner head with Volocity imaging software. Images were processed using ImageJ and Adobe Illustrator software. For fluorescence quantification of GFP antibody staining in embryos, ten embryos per genotype (+/+; UAS-Apc2GFP or brat(-); UAS-Apc2GFP, +/+; src64bGFP or brat(-); scr64bGFP) were imaged using identical settings. Max projections were generated using ImageJ. After subtracting the staining background, the average pixel intensity was measured on twelve to sixteen clusters of EW neurons or across five regions within longitudinal axons for each embryo. The values from the five to ten embryos for each phenotype were averaged.
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5

Embryo and S2R+ Cell Imaging Protocol

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Images of embryos and S2R+ cells were acquired using a spinning disk confocal system (Perkin Elmer) built on a Nikon Ti-U inverted microscope using a Nikon OFN25 60× objective with a Hamamatsu C10600-10B CCD camera and Yokogawa CSU-10 scanner head with Volocity imaging software. Images were processed using ImageJ. When scoring EW crossing, a segment was considered to have a crossing defect if one or both bundles of EW axons failed to reach the midline. When scoring ap crossing, a segment was considered to have an ectopic cross if it contained at least one continuous projection that extended across the midline and reached the lateral bundle of ap axons on the contralateral side. comm expression was scored using Volocity imaging software. Embryos expressed UAS-Tau-Myc-GFP and EW or ap neurons were identified by anti-Myc immunostaining. If the cell body of a neuron could be detected by the in situ signal, that neuron was scored as positive. Crossing and comm expression were scored in EW neurons at stage 14 and in ap neurons at stages 16-17. For all analyses, segments A1-A7 were scored. Midline crossing phenotypes and comm mRNA expression were scored blind to genotype whenever possible.
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