biology

Soluble transferrin receptor

Soluble transferrin receptor 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 Soluble transferrin receptor rather than just read about it. In short: Soluble transferrin receptor conventionally refers to the cleaved extracellular portion of transferrin receptor 1 that is released into serum. This receptor is a protein dimer of two identical subunits, linked together by two pairs of disulfide bonds.

Key takeaways

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

Reference excerpt

Soluble transferrin receptor conventionally refers to the cleaved extracellular portion of transferrin receptor 1 that is released into serum. This receptor is a protein dimer of two identical subunits, linked together by two pairs of disulfide bonds. Its molecular mass 190,000 Dalton. Blood testing of the soluble transferrin receptor (sTfR) is used as a measure of functional iron status and the investigation of iron deficiency anemia. Ferritin, a routine investigation for anemia, is an acute-phase reactant, and may be elevated in states of inflammation, thereby falsely indicating that iron stores are adequate. Because sTfR is insensitive to inflammation, it can detect anemia in patients with preexisting inflammatory states, and is particularly useful in distinguishing between the anemia of chronic disease and anemias caused by lack of iron intake. To date, the conventionally identified soluble transferrin receptor has not been itself implicated in intracellular delivery of transferrin and associated iron stores. A soluble receptor for any ligand could also refer to a molecule present is solution (for example a secretory protein) which would bind with the target ligand and then effect cellular delivery. In this context the multifunctional glycolytic enzyme glyceraldehyde-3-phosphate dehydrogenase (GAPDH) has been reported as a soluble receptor for transferrin. It has been demonstrated to deliver more transferrin as compared to the receptors anchored on the cells surface in numerous cell types.

See also Ferritin Transferrin Total iron binding capacity

Citations

Worked examples

Example 1 — a first encounter with Soluble transferrin receptor

Start with the simplest possible case. Write down what Soluble transferrin receptor 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 Soluble transferrin receptor 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 Soluble transferrin receptor 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 Soluble transferrin receptor

In research: Soluble transferrin receptor 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 Soluble transferrin receptor 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: Soluble transferrin receptor is common in secondary-school and first-year university syllabi. It links to neighbouring topics Molecular and cellular biology stubs, Protein stubs, Proteins, so understanding it makes those chapters shorter.
In everyday life: Look for Soluble transferrin receptor 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 Soluble transferrin receptor in 20 minutes

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

Frequently asked questions

What is Soluble transferrin receptor in simple terms?

Why does Soluble transferrin receptor 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 Soluble transferrin receptor?

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 Soluble transferrin receptor.