Chapter 02 of 5
The Spinneret: Nature’s Extruder
How spiders pull liquid protein into crystalline solid threads.
- Internal Factory
The Storage Organ
Before it becomes a thread, spider silk is stored as a highly concentrated liquid 'dope' in the major ampullate gland.
- The Mechanism
Phase Transition
Transformation occurs as the dope moves through a narrowing duct, converting from a liquid crystal into a solid fiber.
- Chemical Shift
The pH Gradient
As the protein travels, the environment drops from pH 7.2 to 6.0, triggering the proteins to begin unfolding and linking.
17 more cards in this chapter
Could you answer this?
Which specific environmental change within the spider's duct triggers the silk proteins to begin linking?
🕷️ The Spider Farm That Never Worked
- 01Spidroin: The Protein BlueprintExamine the molecular building blocks of nature's miracle fiber.
- 02The Spinneret: Nature’s ExtruderHow spiders pull liquid protein into crystalline solid threads.
- 03The Paradox of Spider FarmingWhy we can farm silkworms but cannot domesticate the spider.
- 04Transgenic SynthesisExtracting silk from goat milk and genetically modified yeast.
- 05The Holy Grail of BiomimicryFuture applications from bulletproof vests to synthetic tendons.