Human U87MG glioblastoma cells are labeled as ALDH1A3+ cell line, HEK293T as ALDH1A2+ cell line, human fetal astrocytes (hASTRO) as ALDH1A1+ cell line and 4T1 mammary carcinoma as triple negative ALDH1As subfamily23. Here, ALDH1A2 is linked to glioblastoma.