biology

PEX12

PEX12 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 PEX12 rather than just read about it. In short: Peroxisome assembly protein 12 is a protein that in humans is encoded by the PEX12 gene. Function PEX12 is needed for protein import into peroxisomes.

Key takeaways

PEX12 belongs to biology; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect PEX12 to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of PEX12 from memory before moving on to harder problems.

Reference excerpt

Peroxisome assembly protein 12 is a protein that in humans is encoded by the PEX12 gene.

Function PEX12 is needed for protein import into peroxisomes. This gene belongs to the peroxin-12 family. Peroxins (PEXs) are proteins that are essential for the assembly of functional peroxisomes.

Clinical significance The peroxisome biogenesis disorders (PBDs; MIM 601539) are a group of genetically heterogeneous diseases that are usually lethal in early infancy. Although the clinical features of PBD patients vary, cells from all PBD patients exhibit a defect in the import of one or more classes of peroxisomal matrix proteins into the organelle. This cellular phenotype is shared by yeast 'pex' mutants, and human orthologs of yeast PEX genes defective in some PBD complementation groups (CGs).

Interactions PEX12 has been shown to interact with PEX10, PEX5 and PEX19.

References

Illustrations

Worked examples

Example 1 — a first encounter with PEX12

Start with the simplest possible case. Write down what PEX12 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 PEX12 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 PEX12 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 PEX12

In research: PEX12 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 PEX12 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: PEX12 is common in secondary-school and first-year university syllabi. It links to neighbouring topics Genes on human chromosome 17, Human chromosome 17 gene stubs, so understanding it makes those chapters shorter.
In everyday life: Look for PEX12 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 PEX12 in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what PEX12 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 PEX12 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is PEX12 in simple terms?

Peroxisome assembly protein 12 is a protein that in humans is encoded by the PEX12 gene. Function PEX12 is needed for protein import into peroxisomes.

Why does PEX12 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 PEX12?

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 PEX12.