19.1 Introduction 19.2 The nucleosome is the subunit of all chromatin 19.3 DNA is coiled in arrays of nucleosomes 19.4 Nucleosomes have a common structure 19.5 DNA structure varies on the nucleosomal surface

生命体是多层次、非线性、多侧面的复杂结构体系， 而细胞是生命体的结构与生命活动的基本单位，有 了细胞才有完整的生命活动

11.1 Introduction 11.2 Lytic development is divided into two periods 11.3 Lytic development is controlled by a cascade 11.4 Functional clustering in phages T7 and T4 11.5 Lambda immediate early and delayed genes are needed for both lysogeny and the lytic cycle

10.1 Introduction 10.2 Regulation can be negative or positive 10.3 Structural gene clusters are coordinately controlled 10.4 The lac genes are controlled by a repressor 10.5 The lac operon can be induced 10.6 Repressor is controlled by a small molecule inducer

1 Cell communication and what is cell signaling 2. Some of the basic characteristics of cell signaling systems 3. Main classes of cell-surface receptor proteins for secreted

分子生物学 Molecular Biology Zhao WANG (王钊), M.D./Pharm.D. School of Life Science Tsinghua University

2.1 Introduction We can think about mapping genes and genomes at several levels of resolution: A genetic (or linkage) map identifies the distance between mutations in terms of recombination frequencies. A linkage map can also be constructed by measuring recombination between sites in genomic DNA

29.1 Introduction 29.2 Fly development uses a cascade of transcription factors 29.3 A gradient must be converted into discrete compartments 29.4 Maternal gene products establish gradients in early embryogenesis 29.5 Anterior development uses localized gene regulators

武汉生物工程学院：《中药鉴定学》课程教学资源（PPT课件讲稿）第11章 藻、菌、地衣类中药（藻类、菌类、地衣类植物均为低等植物）

一、植物来源及功用： 3、海金沙为海金沙科海金沙属植物海金沙Lygodium japonicum（Thunb.）Sw.的干燥成熟孢子