The limb bud is regionalized into 3 functional domains

1. Progress zone

2. Zone of polarizing activity

3. Apical ectodermal ridge

TLS Online TPP Program

#Id: 8614

#Unit 2. Cellular Organization

Two inhibitory phosphorylations on CDK play a critical role in controlling CDK activity:

Y15

T14

TLS Online TPP Program

#Id: 1340

#Unit 4. Cell Communication and Cell Signaling

HER1 & HER4, can form stable homodimers after binding a growth factor.

TLS Online TPP Program

#Id: 1267

#Unit 7. System Physiology – Animal

Zona glomerulosa lacks 17α-hydroxylase. 

TLS Online TPP Program

#Id: 8253

#Unit 1. Molecules and their Interaction Relevant to Biology

Spontaneous (or instantaneous) dipoles

When groups of electrons move to one end of the atom, it creates a dipole. 

TLS Online TPP Program

#Id: 10472

#Unit 4. Cell Communication and Cell Signaling