【正文】
acromolecules復(fù)合大分子 MB course (X), Biochemistry (?) Immunology (?) A3 Macromolecules 多糖是由單糖通過(guò)糖苷鍵共價(jià)結(jié)合的聚合物 Polysaccharides are polymers of simple sugars covalently linked by glycosidic bonds(糖苷鍵 ). 共價(jià)地 A3 Macromolecules 脂類:?jiǎn)我恢? Lipids: individual lipids are not strictly macromolecules, large lipid molecules are built up from small monomeric units and involved in many macromolecule assembly Triglycerides (甘油三酯 ) back Complex macromolecules (復(fù)雜大分子): 是一類生物大分子共價(jià)或非共價(jià)的結(jié)合,這種結(jié)合能顯著提高復(fù)合物的結(jié)構(gòu)與功能。 The establish stage 創(chuàng)立階段( 19501970年) ? 1953年, Watson 和 Crick DNA雙螺旋 (double helix) ? 1958年, Crick中心法則 (Central dogma) ? 1958年, Meselson 和 Stahl :DNA半保留復(fù)制 (semiconservative replication)。 物理學(xué)、生物物理學(xué) ? 物理學(xué):研究物質(zhì)的結(jié)構(gòu)、相互作用及其運(yùn)動(dòng)規(guī)律的學(xué)科。 ? 生物化學(xué):研究生物的化學(xué)組成及其在生命活動(dòng)中變化規(guī)律的一門學(xué)科。 ? 19481953年 Chargaff等 :DNA堿基組成 A=T、G=C的 Chargaff規(guī)則 。 Covalent(共價(jià) ) or noncovalent associations of more than one major classes of large biomolecules which greatly increases the functionality or structural capabilities of the plex. 核蛋白 Nulceoprotein: nucleic acids + protein (Section A4) A3 Macromolecules 糖蛋白 Glycoprotein: carbohydrate + protein 脂蛋白 Lipoprotein: Lipid + protein A4 大分子的組裝 Protein plexes (蛋白質(zhì)復(fù)合體 ) Nucleoprotein (核蛋白 ) Membranes (膜 ) Noncovalent interactions 非共價(jià)相互作用 protein plexes 蛋白質(zhì)復(fù)合體 Long polymers of tubulin維管蛋白 . Schematic diagram showing the (a) crosssectional and (b) surface pattern of tubulin a and b subunits in a microtubule (microfilament) actin and myosin, ponents of muscle fibers as well keratin (cilia纖毛 and flagella鞭毛 ) A4 Large macromolecular Assemblies Noncovalent interaction 角蛋白 Crystal structure of 50S rRNA A4 Large macromolecular As