Secretion of Proteins Flashcards

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1
Q

What are the 2 pathways for the localisation of proteins to organelles

A

Direct pathway - proteins are moved from cytosol to mitochondria nuclei and peroxisomes

Secretory pathway- Proteins are moved from the ER

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2
Q

What are the 2 types of secretion

A

Constitutive secretion

  • All cells
  • Continual exporting some substances

Regulated Secreation

  • Specialised secreaotry cells
  • Substnces stored on secretary vesicles for release in response to signal
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3
Q

What is the pathway for proteins to move through a cell

A

ER
GOLGI
FINAL DESTINATION

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4
Q

What are pancreatic cells

A

Major exocrine organ associated with the digestive tract

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5
Q

What are the islets of langerhans

A

they are endocrine compoanats and are locatednin the tail of the pancreas

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6
Q

What does a pancreatic acinar cells have

A

Large amounts of RER

Large secretary granules

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7
Q

What are the 6 stages of secretion

A
  1. Initiation of protein synthesis
  2. Synthesis segregated from cytosolic proteins
  3. Processing of proteins
  4. Packaging and condensation
  5. Storage in vesicles
  6. Release via exocytosis
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