Immunofluorescence images of stem cells and hiPSC-CMs. (A) Pluripotency staining of R92Q cells. R92Q gene-edited cells are pluripotent as assessed by immunofluorescence staining for the markers SSEA4, OCT4, SOX2, and TRA-1-60. (B) Projections of hiPSC-CMs on glass stained for α-actinin to mark the sarcomeric Z-discs.