3' V regions, AA4, ALLs, B, B cells, B-1, B-1 and B-2 lymphocytes, B-2, B-cell origin, B-cell, B-cell leukemia, B-cell precursor, B-cell precursor (BCP) ALL, B220, B220 antibody, BCP-ALL, Bcor, CD19, CRLF2, CRLF2r, CRLF2r ALL, Jak, Jak1/2/3, Janus kinase, NP23, NP23 pro-B-1 ALL, NP23 pro-B-1 acute lymphoblastic, NUP98, PHF23, Progenitor, Progenitor B-1 B, Stat5a), TSLP receptor, Tslp, VH gene, VH regions, acute lymphoblastic leukemias, fetal liver pro-B fraction BC, human, human B-1 B cells, leukemias, malignancy, mice, murine, murine B-1, murine fetal liver B cells, non-CRLF2r ALL, patients, pro, pro-B-1, progenitor (pro) B-1 cells, stem-cell, thymic stromal lymphopoietin