cellular
• in vitro, heterozygous mutant visceral endoderm (VE) cells show a decreased ability to attach to a laminin 1 matrix relative to wild-type VE cells
• however, both heterozygous and wild-type VE cells show a similar ability to attach to a fibronectin matrix
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• in vitro, heterozygous VE cells show a decreased rate of cell proliferation relative to wild-type VE cells on laminin substrate
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