supplements were used: B27 supplement (50×) (Gibco, 15504-044),
fibroblast-growth factor (100 μg/mL) (Gibco, AA-10-155), insulin
transferrin selenium (ITS) (Gibco, 41400-045), N2 supplement (100×)
(Gibco, 17502-048), and epithelial-growth factor (EGF) (200 μg/mL)
(Invitrogen, PHG0313); mouse-anti-TG2 antibody (CUB 7402, Thermo Fisher
Scientific, M S-224-P), monoclonal mouse anti-ITGβ1 antibody
(Santa Cruz, sc-8978), and anti-SDC-4 antibody (Abcam, ab24511). For
characterization, antimouse CD11b (BioLegend, B192967), antimouse
Sca-1 (BioLegend, B163257), antimouse CD44 (BioLegend, B193068), antimouse
CD45 (BioLegend, B187805), antimouse CD73 (BioLegend, B182619), antimouse
CD29 (BioLegend, B181560), and antimouse CD106 (BioLegend, B178443).
Antirabbit IgG peroxidase (A0545) and antimouse IgG peroxidase (A4416)
conjugates were purchased from Sigma.