CSF3R and acute myeloid leukemia: By corollary, AML cells show a tendency for significantly increased levels of a normally minor CSF3R transcript, class IV (81), which encodes a similar G-CSFR protein in which the C-terminal 87 amino acids are replaced with the same alternate 34 amino acids, p.Val727Ala,fs*34 (p.Val750Ala,fs*34).