Biological membranes are like a guarded border. They separate the cell from the environment and at the same time control the import and export of molecules.
The nuclear membrane can be crossed via many tiny pores. Scientists have discovered that proteins found within the nuclear pore function similar to a velcro. In a new paper, they report how these proteins can be used for controlled and selective transport of particles.
There is much traffic in our cells. Many proteins, for example, need to travel from their production site in the cytoplasm to the nucleus, where they are used to read genetic information. Pores in the nuclear membrane enable their transport into and out of the cell nucleus.