MAPK7 and sarcoma: The rarity of mutations in ERK5 in sarcoma was also indicated by analysis of the MSK2022 dataset (n = 2138 sarcoma samples, also accessed through cBioPortal), which showed no mutations in ERK5. Interestingly, data obtained from the Firebrowse online resource indicated that the second most altered cytogenetic region in sarcomas with respect to amplification/gain corresponded to 17p11.2 (Fig. 2b), which is the chromosomal region containing the ERK5 locus.