MCL1 is a member of the Bcl-2 family. MCL1 takes part in the control of apoptosis against cell existence， and in the preservation of viability but not of proliferation. Alternative splicing happens at this locus and two transcript variants encoding different isoforms are known. Isoform 1 is the longer gene product and it increases cell existence by inhibiting apoptosis. Isoform 2 is a shorter gene product which indorses apoptosis and is death-inducing.
