PODXL and cyst: (A,B) Human pluripotent stem cells (hPSC)-derived pluripotent cyst (hPSC-pluripotent cyst, Glass-3D in A) and amnion cyst (Glass-3D+BMP in B) assays: immunofluorescence (IF) images show hPSC-pluripotent (A) and -amnion (B) cysts stained for PODXL (lumen, magenta) and DNA (nuclear shape, blue).