The obtained recombinant vector, named pGEM mimic, can be used as a common competitor for either b3a2 or b2a2 type of bcr abl cDNA.

• 较b2a2型bcr－ablcDNA相应的201bp扩增片段长39bp，使之适于作为b3a2和b2a2型两类bcr－ablmRNA定量PCR的通用内标物。