Embryonic stem cells (ESCs) are pluripotent cells derived from preimplantation emb...

Th1 immunity protects against tuberculosis infection in mice and humans. The widel...

染色体中连接两个染色单体, 并将染色单体分为两臂: 短臂(p)和长臂(q)的部位。由于此部位的染色质较细、内缢, 又叫主缢痕(primary constrictio...

As the molecular mechanism of circadian clocks has reached high complexity, the fu...

Recent debates about model organisms echo far into the past; taking a longer view ...

This chapter will describe the preparation and use of a semipermeabilized (SP) cel...

Researchers interested in studying RNA structure and function or RNA-protein inter...

Ras proteins were highly conserved during evolution. They function as a point of c...

物质通过质膜进出细胞的方式之一。物质必须在载体蛋白的协助下，才能从高浓度一侧通过质膜向低浓度一侧扩散，但此种方式不消耗代谢能。协助扩散和自由扩散都是物质顺浓度梯度的...