Department;
of;
Ophthalmology;
and;
Doheny;
Eye;
Institute,University;
of;
Southern;
California,Los;
Angeles,CA;
90033,USA;
Department;
of;
Mechanical;
and;
Aerospace;
Engineering,University;
of;
California,Los;
Angeles,CA;
90095,USA;
Center;
for;
Cell;
Control,University;
of;
California,Los;
Angeles,CA;
90095,USA;
signalling; network; cell; identification; differentiation; mouse; embryonic; stem; cells;