NL(left)1ul

Cell lineage of regularly developing sea urchin embryo: NL(left)1ul

Cell name	NL(left)1ul
Cleavage number	6
Number of cells after cleavage	60
Cleavage direction (with respect to the A/V axis)	horizontal
Mother cell	NL(left)1u
Sister cell	NL(left)1uu
Progeny
Tier	an1
Prospective territory