32D, AKT, Ba, Ba/F3 cells, DNA sequence, EPOR, ERK, ET, GCSFR, JAK, JAK kinase, JAK2, JAK2V617F, JAK2V617F allele, JAKV617F, MF, MPD, MPL, MPLW515L, PV, Plt, STAT, STAT3, STAT5, UT7, W515L, erythropoietin receptor, essential thrombocytosis, exons, germline DNA, granulocyte-colony stimulating factor receptor, human, myelofibrosis, myeloid metaplasia, myeloproliferative disorder, myeloproliferative disorders, patients, polycythemia vera, reticulin, splenomegaly, thrombocytosis, thrombopoietin, thrombopoietin receptor, wild-type MPL