A C. elegans embryo undergoing ventral enclosure
expressing a DLG-1::GFP translational fusion protein
pseudocolored cyan, imaged using multiphoton excitation
microscopy [Mathias Koeppen].
Ventral epidermal cells migrate ventrally and meet at the
ventral midline. Specific cells lead this migration, which
is completed when cells make cadherin-dependent contacts
along the ventral midline.