Crebrf^{Gt(YHD319)Byg}

将β-geo cassette插入内皮1后，Northern blot分析证实了大脑、心脏、骨骼、肺、胸腺、肾脏和脾脏中不含2至4号外显子的转录本表达。 (Source: Northern blot analysis confirmed the absence of transcript with exons 2-4 expression in brain, heart, skeleton, lung, thymus, kidney, and spleen after the beta-geo cassette was inserted into intron 1.)