Frameshift deletion of bases 4:1082764 through 4:1082767 resulting in the addition of VGQCTSRFLPHLMKLPVALRRRS after alanine 121 of all Actβ isoforms and premature truncation after these novel amino acids.
Deletion of bases 4:1082764..1082767 in Actbeta results in a frameshift and early translation termination after the additon of 23 novel amino acids (VGQCTSRFLPHLMKLPVALRRRS).