Ecological compression

Short term evolutionary response

More number of species coexist together

Non inheritable trait

Not change habitat but reduce the food range

TLS Online TPP Program

#Id: 9666

#XL - T Zoology

PI-3 kinase adds a phosphate to the 3′ carbon in one of two separate PI substrates, leading to formation of two PI 3-phosphates: PI(3,4)P2 or PI(3,4,5)P3

TLS Online TPP Program

#Id: 9667

#XL - T Zoology

In cells, PI-3 kinase pathway :

Triggers cell division 

Prevents apoptosis

Induces specific changes in cell metabolism

TLS Online TPP Program

#Id: 9668

#XL - T Zoology

An important signal transduction protein that binds to PI 3-phosphates is protein kinase B (Akt),  a serine/threonine kinase

TLS Online TPP Program

#Id: 9669

#XL - T Zoology

PI-3 kinase was first identified in studies of the 

polyoma virus, a DNA virus

TLS Online TPP Program

#Id: 9670

#XL - T Zoology

PKB contains:

A PH domain

A kinase domain

TLS Online TPP Program

#Id: 9671

#XL - T Zoology

PH domain of PKB binds with high affinity to the 

3-phosphates in both PI(3,4)P2 and PI(3,4,5)P3