De Novo Isolation of Embryonic Stem (ES) Cell Lines from Blastocysts Protocol The starting material for de novo isolation of stem cell lines can be either normal 3.5-days post coitum (dpc) expanded blastocysts or "delayed" blastocysts. Delayed blastocysts are usually collected 4-6 days after ovariectomy. For both groups of blastocysts, tissue culture procedures are similar. The only difference is the timing of the first disaggregation, because delayed blastocysts will initially grow more slowly.
Isolating Postimplantation Embryos: Prestreak-Stage Protocol Isolation of postimplantation-stage embryos allows one to study normal development as well as genetic mutations that cause post-implantation defects. This protocol describes a method for isolating prestreak-stage embryos (~5.5 days post coitum [dpc]).
Separating Postimplantation Germ Layers Protocol Germ layers are multipotent tissues that have the ability to differentiate into various tissue types. Isolation and manipulation of germ layers is important for examining differentiation. This protocol describes a method for separating postimplantation germ layers.
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