Rabbit Anti-Human PML polyclonal antibody for IHC-P. The PML protein is a zinc finger transcription factor expressed as three major transcription products due to alternative splicing. The gene encoding human PML maps to chromosome 15q22. The t (15; 17) (q22; q11.2-q12) chromosomal trans-location of the retinoic acid receptor alpha (RARalpha) gene occurs in virtually all cases of acute promyelocytic leukemia and results in the expression of a PML/RARalpha chimeric protein of 106kDa. Myeloid precursor cells expression the PML/RARalpha chimera fail to differentiate and exhibit an increased growth rate consequent to diminished apoptosis.