В. Водородные связи

Особый тип нековалентной связи — водородная связь — имеет в биохимии исключительно важное значение. В образовании водородной связи принимают участие атомы водорода OH-, NH- и SH-групп (так называемых доноров водородной связи), которые взаимодействуют со свободной парой электронов атомов-акцепторов (например, O, N или S). Энергия водородной связи составляет 10-40 кДж/моль, что значительно меньше энергии ковалентной связи (меньше 400 кДж/моль). Однако многочисленные водородные связи вносят существенный вклад в стабилизацию структуры многих макромолекул (см. Глюконеогенез, Дезоксирибонуклеиновые кислоты). Например, L-дофа может образовывать две внутримолекулярные водородные связи. На шаро-стержневой модели L-дофа водородные мостики указаны штрихами.


Основы биохимии. Общая химия / Строение молекул

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Handbook of Nanoindentation: With Biological Applications / Broadly divided into two parts, this guide’s first part presents the a’basic sciencea’ of nanoindentation, including the background of contact mechanics underlying indentation technique, and the instrumentation used to gather mechanical data. Both the mechanics background and the instrumentation oveHandbook of Nanoindentation: With Biological Applications
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