ArticleslgStudy

biology

LIM2

LIM2 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 LIM2 rather than just read about it. In short: Lens fiber membrane intrinsic protein is a protein that in humans is encoded by the LIM2 gene. The mammalian lens fiber cell membrane contains 5 major proteins ranging from 70 kD to 19 kD in size.

LIM2 — main illustration
LIM2 — illustration

Key takeaways

  • LIM2 belongs to biology; place it in that map before memorising details.
  • Learn the definition first, then one example that makes the definition concrete.
  • Connect LIM2 to a quantity you can measure, compute or draw — that is where exam questions come from.
  • Reproduce the core statement of LIM2 from memory before moving on to harder problems.

Reference excerpt

Lens fiber membrane intrinsic protein is a protein that in humans is encoded by the LIM2 gene. The mammalian lens fiber cell membrane contains 5 major proteins ranging from 70 kD to 19 kD in size. The specific function of these proteins is unknown. Some of them have been shown to be involved in the formation of cataracts, e.g., crystalline-gamma-1 (CRYG1; MIM 123660). The second most abundant intrinsic membrane protein of the lens fiber cell is MP19, so named for major lens protein having a molecular weight of 19.5 kD. This protein appears to contain 4 transmembrane domains, is a substrate for cAMP-dependent protein kinase and protein kinase C, and binds with calmodulin. Taken together, these suggest that MP19 functions in some way as a junctional component, possibly involved with lens cell communication. It has been shown to be involved with cataractogenesis.[supplied by OMIM]

References

Further reading

Illustrations

LIM2 illustration
LIM2 illustration
LIM2 illustration
LIM2 illustration
LIM2 illustration

Worked examples

Example 1 — a first encounter with LIM2

Start with the simplest possible case. Write down what LIM2 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 LIM2 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 LIM2 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 LIM2

In research
LIM2 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 LIM2 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
LIM2 is common in secondary-school and first-year university syllabi. It links to neighbouring topics Genes on human chromosome 19, Human chromosome 19 gene stubs, so understanding it makes those chapters shorter.
In everyday life
Look for LIM2 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.

Affiliate

Preply — study more efficiently by working with a personal tutor. 50% off.

How to study LIM2 in 20 minutes

  1. Read the reference excerpt below once, without taking notes.
  2. Close the page and write down what LIM2 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 LIM2 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is LIM2 in simple terms?

Lens fiber membrane intrinsic protein is a protein that in humans is encoded by the LIM2 gene. The mammalian lens fiber cell membrane contains 5 major proteins ranging from 70 kD to 19 kD in size.

Why does LIM2 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 LIM2?

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 LIM2.

Tags

  • Genes on human chromosome 19
  • Human chromosome 19 gene stubs

Keep exploring