Comparison of the intensities of exon 1/2 and exon 2/3 junction probes of Grp78 in 52 samples included in this GEO profile revealed that the HL-60 and chronic myeloid leukemia (CML) K562 cell lines have the highest probability to express the intron 1 retention form of Grp78, while adult organs such as the heart, skeletal muscle and cerebral cortex are the most unlikely (Figure S3). This evidence concerns the gene HSPA5 and chronic myelogenous leukemia, BCR-ABL1 positive.