"We aimed to screen exons 9-14 of the CD22 gene which is a mutational hot spot region in B-precursor acute lymphoblastic leukemia (pre-B ALL) patients. Nine variants of which two novel were found. Novel variants were in introns 10 and 13. Gly745Asp (rs10406069) variant was missense and Cys790Arg (rs79438722) variant was silent."xsd:string