All translations
Jump to navigation
Jump to search
Enter a message name below to show all available translations.
Found 2 translations.
| Name | Current message text |
|---|---|
| h English (en) | There are three amino acids with side chains that are cations at neutral pH: [[arginine]] (Arg, R), [[lysine]] (Lys, K) and [[histidine]] (His, H). Arginine has a charged [[Guanidine|guanidino]] group and lysine a charged alkyl amino group, and are fully protonated at pH 7. Histidine's imidazole group has a pK<sub>a</sub> of 6.0, and is only around 10 % protonated at neutral pH. Because histidine is easily found in its basic and conjugate acid forms it often participates in catalytic proton transfers in enzyme reactions. |
| h Japanese (ja) | [[arginine/ja|アルギニン]]（Arg、R）、[[lysine/ja|リジン]]（Lys、K）、[[histidine/ja|ヒスチジン]]（His、H）の3つである。アルギニンは荷電した[[guanidine/ja|グアニジン]]基を持ち、リジンは荷電したアルキルアミノ基を持ち、pH7で完全にプロトン化される。ヒスチジンのイミダゾール基はpK<sub>a</sub>が6.0であり、中性pHでは10%程度しかプロトン化されない。ヒスチジンは塩基性と共役酸の形で容易に見出されるため、酵素反応における触媒的プロトン移動にしばしば関与する。 |