If further investigations confirm this latter result, the in vivo tyrosine phosphorylation of MYH9-ALK protein could involve mechanisms different from those described in the other ALK hybrid proteins..     ///    "In contrast to the previously reported ALK fusion proteins, MYH9-ALK may lack a functional oligomerization domain. "    ///    Nucleotide sequence of the MYH9-ALK chimeric cDNA revealed that the ALK breakpoint was different from all those previously reported. 