biology

Mir-219 microRNA precursor family

Mir-219 microRNA precursor family 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 Mir-219 microRNA precursor family rather than just read about it. In short: In molecular biology, the microRNA miR-219 was predicted in vertebrates by conservation between human, mouse and pufferfish and cloned in pufferfish. It was later predicted and confirmed experimentally in Drosophila.

Key takeaways

Mir-219 microRNA precursor family belongs to biology; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Mir-219 microRNA precursor family to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Mir-219 microRNA precursor family from memory before moving on to harder problems.

Reference excerpt

In molecular biology, the microRNA miR-219 was predicted in vertebrates by conservation between human, mouse and pufferfish and cloned in pufferfish. It was later predicted and confirmed experimentally in Drosophila. Homologs of miR-219 have since been predicted or experimentally confirmed in a wide range of species, including the platyhelminth Schmidtea mediterranea, several arthropod species and a wide range of vertebrates (MIPF0000044). The hairpin precursors (represented here) are predicted based on base pairing and cross-species conservation; their extents are not known. In this case, the mature sequence is excised from the 5' arm of the hairpin. miR-219 has also been linked with NMDA receptor signalling in humans by targeting CaMKIIγ (a kind of protein kinase dependent to calcium and calmodulin) expression. And it has been suggested that deregulation of this miRNA can lead to the expression of mental disorders such as schizophrenia. Recent findings show that miR-219 is linked with Tau toxicity, suggesting that miR-219 is involved in neurodegenerative disease, such as Alzheimer's disease, Parkinson's disease etc.

References

External links

Page for mir-219 microRNA precursor family at Rfam MIPF0000044 MicroRNA of the month at the miRNA blog

Illustrations

Worked examples

Example 1 — a first encounter with Mir-219 microRNA precursor family

Start with the simplest possible case. Write down what Mir-219 microRNA precursor family 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 Mir-219 microRNA precursor family 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 Mir-219 microRNA precursor family 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 Mir-219 microRNA precursor family

In research: Mir-219 microRNA precursor family 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 Mir-219 microRNA precursor family 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: Mir-219 microRNA precursor family is common in secondary-school and first-year university syllabi. It links to neighbouring topics MicroRNA, Molecular and cellular biology stubs, so understanding it makes those chapters shorter.
In everyday life: Look for Mir-219 microRNA precursor family 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 Mir-219 microRNA precursor family in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Mir-219 microRNA precursor family means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Mir-219 microRNA precursor family out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Mir-219 microRNA precursor family in simple terms?

Why does Mir-219 microRNA precursor family 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 Mir-219 microRNA precursor family?

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 Mir-219 microRNA precursor family.