dc41a03.y1 NICHD_XGC_Emb3 Xenopus laevis cDNA clone IMAGE:3399628 5' similar to gb:X75018 M.musculus mRNA for Id4 helix-loop-helix protein (MOUSE); gb:dbj|AB019520.1|AB019520 Xenopus laevis mRNA for helix-loop-helix type (XENOPUS), mRNA sequence