Alpha thalassemia

Japanese: αサラセミア - あるふぁさらせみあ
Alpha thalassemia

…Defects in the synthesis of the globin chains of hemoglobin are caused by gene defects or abnormalities (defects or functional abnormalities) in the messenger RNA (mRNA) during the process of copying (transcription) the genetic code. Hemoglobin is composed of heme and two types of globin, each of which has two polypeptide chains. Of these, a decrease in the production of the alpha chain is called alpha thalassemia and is caused by a defect in the alpha chain gene. A defect in all four of the four alpha chain genes completely suppresses the production of the alpha chain, causing fetal hydrops and premature birth. …

*Some of the terminology that mentions "alpha thalassemia" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…ヘモグロビンのグロビン鎖の合成の欠陥は,遺伝子の欠損や遺伝子の暗号を写しとる過程(転写)のメッセンジャーRNA(mRNA)の異常(欠損や機能異常など)によって生ずる。ヘモグロビンはヘムと2種類各2本のポリペプチド鎖からなるグロビンによって構成されているが,このうちα鎖の産生の減少は,αサラセミアといわれα鎖遺伝子の欠損による。4個のα鎖遺伝子のうち,4個すべての欠損は,α鎖産生を完全に抑制し胎生期に胎児水腫症をおこし死早産をおこす。…

※「αサラセミア」について言及している用語解説の一部を掲載しています。

出典|株式会社平凡社世界大百科事典 第2版について | 情報

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