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TNFSF12

TNFSF12 is a biology topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand TNFSF12 rather than just read about it. In short: Tumor necrosis factor ligand superfamily member 12 also known as TNF-related weak inducer of apoptosis (TWEAK) is a protein that in humans is encoded by the TNFSF12 gene. Function TWEAK was discovered in 1997.

TNFSF12 — main illustration
TNFSF12 — illustration

Key takeaways

  • TNFSF12 belongs to biology; place it in that map before memorising details.
  • Learn the definition first, then one example that makes the definition concrete.
  • Connect TNFSF12 to a quantity you can measure, compute or draw — that is where exam questions come from.
  • Reproduce the core statement of TNFSF12 from memory before moving on to harder problems.

Reference excerpt

Tumor necrosis factor ligand superfamily member 12 also known as TNF-related weak inducer of apoptosis (TWEAK) is a protein that in humans is encoded by the TNFSF12 gene.

Function TWEAK was discovered in 1997. The protein encoded by this gene is a cytokine that belongs to the tumor necrosis factor (TNF) ligand family. This protein is a ligand for the FN14/TWEAKR receptor. This cytokine has overlapping signaling functions with TNF, but displays a much wider tissue distribution. Leukocytes are the main source of TWEAK including human resting and activated monocytes, dendritic cells and natural killer cells. TWEAK can induce apoptosis via multiple pathways of cell death in a cell type-specific manner. This cytokine is also found to promote proliferation and migration of endothelial cells, and thus acts as a regulator of angiogenesis.

Clinical significance Excessive activation of the TWEAK pathway in chronic injury has been described to promote pathological tissue changes including chronic inflammation, fibrosis and angiogenesis. In chronic liver disease, for example, TWEAK expression is enhanced and causes hepatic stellate cells, which are key regulators of liver fibrosis, to proliferate.

References

Further reading

Illustrations

TNFSF12 illustration
TNFSF12 illustration
TNFSF12 illustration
TNFSF12 illustration

Worked examples

Example 1 — a first encounter with TNFSF12

Start with the simplest possible case. Write down what TNFSF12 claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In biology, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to TNFSF12 before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about TNFSF12 ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of TNFSF12

In research
TNFSF12 appears in biology research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry
Engineering practice reuses TNFSF12 in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom
TNFSF12 is common in secondary-school and first-year university syllabi. It links to neighbouring topics Genes on human chromosome 17, Protein stubs, so understanding it makes those chapters shorter.
In everyday life
Look for TNFSF12 outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study TNFSF12 in 20 minutes

  1. Read the reference excerpt below once, without taking notes.
  2. Close the page and write down what TNFSF12 means in your own words.
  3. Compare your version with the excerpt and mark what you missed.
  4. Work through the three examples above with pen and paper.
  5. Explain TNFSF12 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is TNFSF12 in simple terms?

Tumor necrosis factor ligand superfamily member 12 also known as TNF-related weak inducer of apoptosis (TWEAK) is a protein that in humans is encoded by the TNFSF12 gene. Function TWEAK was discovered in 1997.

Why does TNFSF12 matter?

Because it connects several biology ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study TNFSF12?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on TNFSF12.

Tags

  • Genes on human chromosome 17
  • Protein stubs

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