Chemical regulation of stem cells takes the form of secreted proteins from surrounding cells that influence stem cell states and progenitor differentiation through endocrine, paracrine, or juxtacrine mechanisms.

TLS Online TPP Program

#Id: 5433

#Unit 7. System Physiology – Animal

Important factors in the establishment of the normal resting membrane potential:

Na+-K+ pump

K+ “leak” channels

TLS Online TPP Program

#Id: 10082

#Unit 4. Cell Communication and Cell Signaling

The binding of integrins to their ligands depends on extracellular divalent cations(Ca+2 & Mg+2)

TLS Online TPP Program

#Id: 2640

#Unit 13. Methods in Biology

Run-off transcription is a means of checking the efficiency and accuracy of in vitro transcription.

TLS Online TPP Program

#Id: 7357

#Unit 11. Evolution and Behavior

TLS Online TPP Program

#Id: 1750

#Unit 4. Cell Communication and Cell Signaling

Class II MHC transcriptional activator called CIITA and another transcription factor called RFX, have both been shown to activate the promoter of class II MHC genes.

Defects in these transcription factors cause one form of bare lymphocyte syndrome.