Chapter 4: Cell Membrane and Cell Surface I. Cell membrane I. Cell Junctions II. Cell adhesion IV. Extracellular matrix http://www.cbi.pku.edu.cn/chinese/documents/chenjgChapter 4: Cell Membrane and Cell Surface I. Cell Membrane II. Cell Junctions III. Cell Adhesion IV. Extracellular Matrix http://www.cbi.pku.edu.cn/chinese/documents/chenjg/