dc34a04.y1 NICHD_XGC_Emb3 Xenopus laevis cDNA clone IMAGE:3398958 5' similar to gb:L39770 Mus musculus homeobox protein (MOUSE); gb:gb|L47990.1|XELXGBX2R Xenopus laevis homeobox (XENOPUS), mRNA sequence