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biology

KIF21A

KIF21A 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 KIF21A rather than just read about it. In short: Kinesin-like protein KIF21A is a protein that in humans is encoded by the KIF21A gene. KIF21A belongs to a family of plus end-directed kinesin motor proteins.

KIF21A — main illustration
KIF21A — illustration

Key takeaways

  • KIF21A belongs to biology; place it in that map before memorising details.
  • Learn the definition first, then one example that makes the definition concrete.
  • Connect KIF21A to a quantity you can measure, compute or draw — that is where exam questions come from.
  • Reproduce the core statement of KIF21A from memory before moving on to harder problems.

Reference excerpt

Kinesin-like protein KIF21A is a protein that in humans is encoded by the KIF21A gene. KIF21A belongs to a family of plus end-directed kinesin motor proteins. Neurons use kinesin and dynein microtubule-dependent motor proteins to transport essential cellular components along axonal and dendritic microtubules.

References

Further reading

External links Engle Laboratory CFEOM page GeneReviews/NCBI/NIH/UW entry on Congenital Fibrosis of the Extraocular Muscles OMIM entries on Congenital Fibrosis of the Extraocular Muscles

Illustrations

KIF21A illustration
KIF21A illustration
KIF21A illustration
KIF21A illustration
KIF21A illustration

Worked examples

Example 1 — a first encounter with KIF21A

Start with the simplest possible case. Write down what KIF21A 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 KIF21A 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 KIF21A 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 KIF21A

In research
KIF21A 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 KIF21A 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
KIF21A is common in secondary-school and first-year university syllabi. It links to neighbouring topics Genes on human chromosome 12, Human chromosome 12 gene stubs, so understanding it makes those chapters shorter.
In everyday life
Look for KIF21A 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 KIF21A in 20 minutes

  1. Read the reference excerpt below once, without taking notes.
  2. Close the page and write down what KIF21A 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 KIF21A out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is KIF21A in simple terms?

Kinesin-like protein KIF21A is a protein that in humans is encoded by the KIF21A gene. KIF21A belongs to a family of plus end-directed kinesin motor proteins.

Why does KIF21A 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 KIF21A?

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 KIF21A.

Tags

  • Genes on human chromosome 12
  • Human chromosome 12 gene stubs

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