parahematin

例句：

1. 1. He was diagnosed with a rare blood disorder that requires regular blood transfusions.
   他被诊断出患有一种罕见的血液疾病，需要定期输血。
2. 2. The patient's condition worsened after receiving the treatment, prompting further investigation into the cause of the parahematin deficiency.
   患者在接受了治疗之后病情恶化，进一步调查了导致缺乏血红素的原因。
3. 3. The research team discovered that the patient's parahematin levels were significantly lowerthan normal, which could be attributed to the underlying genetic defect.
   研究小组发现，患者的血红素水平明显低于正常值，这可能与遗传缺陷有关。