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CELL COMMUNICATION. Slide show modified from a PREZI by David Knuffke. KINASE: Protein that “phosphorylates” (adds a phosphate to) another molecule TYROSINE KINASES: Proteins that form dimers. Tyrosine amino acid residues are active in transfer of phosphates to relay proteins

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cell communication
CELL COMMUNICATION

Slide show modified from a PREZI by David Knuffke

slide10

KINASE: Protein that “phosphorylates” (adds a phosphate to) another molecule

  • TYROSINE KINASES: Proteins that form dimers. Tyrosine amino acid residues are active in transfer of phosphates to relay proteins
  • Remain ACTIVE as long as LIGAND is attached
slide13

Internal signalling molecules released due to external “girst” signals. Trigger sub-response pathways

amplification more from less
AMPLIFICATIONMORE FROM LESS

Cells amplify the message

complication a branching network
COMPLICATIONA “Branching Network”

Simplicity leads to COMPLEXITY

  • S
more examples why cells communicate
MORE EXAMPLESWhy cells communicate?
  • Wound healing
  • QUORUM SENSING in bacteria communication among microbes that triggers group response when population reaches certain density
  • APOPTOSIS-Programmed cell death
  • Yeast mating
apoptosis cell suicide
APOPTOSIS“Cell suicide”

Why are “Death proteins“ present in inactive form?

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