biology

PPP2R4

PPP2R4 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 PPP2R4 rather than just read about it. In short: Serine/threonine-protein phosphatase 2A regulatory subunit B is an enzyme that in humans is encoded by the PPP2R4 gene. Protein phosphatase 2A is one of the four major Ser/Thr phosphatases and is implicated in the negative control of cell growth and division.

Key takeaways

PPP2R4 belongs to biology; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect PPP2R4 to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of PPP2R4 from memory before moving on to harder problems.

Reference excerpt

Serine/threonine-protein phosphatase 2A regulatory subunit B is an enzyme that in humans is encoded by the PPP2R4 gene. Protein phosphatase 2A is one of the four major Ser/Thr phosphatases and is implicated in the negative control of cell growth and division. Protein phosphatase 2A holoenzymes are heterotrimeric proteins composed of a structural subunit A, a catalytic subunit C, and a regulatory subunit B. The regulatory subunit is encoded by a diverse set of genes that have been grouped into the B/PR55, B'/PR61, and B/PR72 families. These different regulatory subunits confer distinct enzymatic specificities and intracellular localizations to the holozenzyme. The product of this gene belongs to the B' family. This gene encodes a specific phosphotyrosyl phosphatase activator of the dimeric form of protein phosphatase 2A. Alternative splicing results in multiple transcript variants encoding different isoforms.

Interactions PPP2R4 has been shown to interact with PPP2R3A, CCNG1 and Janus kinase 2.

References

Illustrations

Worked examples

Example 1 — a first encounter with PPP2R4

Start with the simplest possible case. Write down what PPP2R4 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 PPP2R4 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 PPP2R4 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 PPP2R4

In research: PPP2R4 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 PPP2R4 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: PPP2R4 is common in secondary-school and first-year university syllabi. It links to neighbouring topics Genes on human chromosome 9, Human chromosome 9 gene stubs, so understanding it makes those chapters shorter.
In everyday life: Look for PPP2R4 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 PPP2R4 in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what PPP2R4 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 PPP2R4 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is PPP2R4 in simple terms?

Why does PPP2R4 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 PPP2R4?

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 PPP2R4.