Altruism

Altruistic acts serve to benefit the individual’s close relatives, or kin. They enhance the fitness of other individuals—their offspring—at a cost to themselves.

TLS Online TPP Program

#Id: 7777

#Unit 2. Cellular Organization

An NPC is made up of many copies of some 30 different proteins called nucleoporins.

TLS Online TPP Program

#Id: 7778

#Unit 2. Cellular Organization

Eight approximately 100-nm long filaments extend into the nucleoplasm with the distal ends of these filaments joined by a terminal ring, forming a structure called the nuclear basket.

TLS Online TPP Program

#Id: 7779

#Unit 2. Cellular Organization

The nucleoporins are of three types: 

a. Structural nucleoporins

b. Membrane nucleoporins

c. FG-nucleoporins

TLS Online TPP Program

#Id: 7780

#Unit 2. Cellular Organization

A set of seven structural nucleoporins forms a Y-shaped structure about the size of the ribosome, known as the Y complex.

TLS Online TPP Program

#Id: 7781

#Unit 2. Cellular Organization

A structural motif repeated several times within the Y-complex is closely related to a structure found in the COPII proteins that drive the formation of coated vesicles within cells.

TLS Online TPP Program

#Id: 7782

#Unit 2. Cellular Organization

Nucleoporin

Large group of proteins that make up the nuclear pore complex. one class (FG-nucleoporins) participates in nuclear import and export.