人类合作的基因设定 友好的基因突变：威廉姆综合症 Williams syndrome is caused by a deletion of part of chromosome 7 that includes the LIM kinase and elastin coding sequences.Above, this sequence (stained red)can no longer be seen in the chromosome with the deletion (green arrow )[Photograph kindly provided by L.G.Shaffer,Baylor College of Medicine.友好的基因突变：威廉姆综合症 人类合作的基因设定