CASC3 and Miyoshi myopathy: Interestingly, the synergistic effect of MLN8237 with BTZ was not remarkable on t(4;14) negative MM cells, including 8226, MM.1S and U266, compared with t(4;14) positive MM cells including LP‐1, KMS‐11 and OPM‐2 (Figure 1D and Figure S1C).