STIM1 and glioblastoma: We recently conducted a high throughput screen of small molecule modulators of the Ca2+/calcineurin‐NFAT pathway in U87 glioblastoma cells.[15] During our analysis of the RNA‐seq data (GSE108749),[15] we serendipitously discovered an extra exon that encodes 31 additional amino acids after position 491 (named as PAD for pro‐activation domain) in STIM1 (Figure 1a).