細胞色素複合體 (英語:cytochrome complex )簡稱 細胞色素c (cyt c ),是一種血红素蛋白(hemoprotein),屬於“细胞色素c家族 ”[ 1] 。細胞色素c會與粒線體 內膜輕微連接,結構鬆散而微小的它和其他細胞色素 不同,是一種高度可溶性蛋白,在水中的可溶性達每公升100克。細胞色素c是電子傳遞鏈 不可或缺的元件,負責攜帶一粒電子,在複合物III 和複合物IV 之間傳遞。此外,它能夠接受氧化 和還原反應 ,但不與氧 結合。在人體中,細胞色素c已經由CYCS 基因 完成編碼[ 2] [ 3] 。
細胞色素c和細胞程序性死亡 有關[ 4] 。
細胞色素c被證實會和COX4I2 進行交互作用 [ 5] [ 6] [ 7] [ 8] 。
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