... mouse and human Meis3, which represent the 3.2isoform, and we show that a similar Meis3 isoform is also present in multiple mouse tissues. Semiquantita-tive RT-PCR suggests that the Meis3.2 ... key regulatory domain within theseproteins that can mediate both positive and negativeinfluences on transcriptional activity. Interestingly,splice variants of mammalian Meis1 and Meis2, andDrosophila ... Meis2-F, 5¢-AGGACATCGCGGTCTTCG-3¢; Meis2-R, 5¢-GAGGTCGATGGGCATTTTC-3¢;Meis3-F, 5¢-GATGATCCAGCCATCCA-3¢; Meis3-R, 5¢-GGCTGGGTAGTCCTCGAAGT-3¢; mMeis3-F, 5¢-GTCCAGGCCATCCAGGTACT-3¢; and mMeis3-R,...