Journal
NATURE PROTOCOLS
Volume 1, Issue 3, Pages 1468-1476Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/nprot.2006.222
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Lineage analysis of Caenorhabditis elegans is a powerful tool for characterizing developmental phenotypes and embryonic gene-expression patterns. We present a detailed protocol for the lineaging of embryos by computational analysis of 4D images of embryos that ubiquitously express histone - GFP (green fluorescent protein) fusion proteins through the 350 cell stage followed by manual editing. We describe how to optimize imaging settings for this purpose, the use of the lineage-extraction software, StarryNite, and the lineage-editing software, AceTree. In addition, we describe a useful polymer bead mounting technique for C. elegans embryos that has several advantages compared with the standard agar pad mounting technique. The protocol requires about 1 h of user time spread over 2 days to generate the raw lineage, and an additional 2 or 4 h to edit the lineage to the 194- or 350- cell stage, respectively.
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