Moreover, the ratio of threonine and serine to isoleucine, leucine and valine in the amniotic fluid of spina bifida fetus is higher than normal.
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美
- 但脊柱裂羊水中的苏氨酸、丝氨酸与异亮氨酸、亮氨酸、缬氨酸的比值明显地高于正常值。