Re: [重要] 遺傳工程課本

看板NKNU_BT97作者yzhsage (Marx, Karl)時間15年前 (2008/10/25 13:48)推噓2(2推 0噓 3→)

留言5則, 2人參與討論串2/2 (看更多)

Histidine 3個pKa: 1.8, 6.0, 9.2 求pH5.4時帶正1價的His佔有的比例 pH = 5.4 => [H+] = 10^(-5.4) [His+][H+] ————— =10^-1.8 => [His+] = [His2+] * 10^3.6 [His2+] [His0][H+] ————— =10^-6.0 => [His0] = [His+] * 10^(-0.6) [His+] [His-][H+] ————— =10^-9.2 => [His-] = [His0] * 10^(-3.8) [His0] => [His0] = [His2+] * 10^3 [His-] = [His2+] * 10^(-0.8) 10^3.6 (His+)% = ————————————————— * 100 % 1 + 10^3.6 + 10^3 + 10^(-0.8) = 79.908 % ≒ 80% -- ※ 發信站: 批踢踢實業坊(ptt.cc) ◆ From: 122.122.129.116

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yzhsage

10/25 13:54, , 1^F

10/25 13:54, 1^F

※ 編輯: yzhsage 來自: 122.122.129.116 (10/25 15:13)

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hugasaga

10/26 11:39, , 2^F

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yzhsage

10/27 21:44, , 3^F