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biology

H1299

H1299 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 H1299 rather than just read about it. In short: H1299, also known as NCI-H1299 or CRL-5803, is a human non-small cell lung carcinoma cell line derived from the lymph node, which is widely used in research. As with other immortalized cell lines, H1299 cells can divide indefinitely.

Key takeaways

  • H1299 belongs to biology; place it in that map before memorising details.
  • Learn the definition first, then one example that makes the definition concrete.
  • Connect H1299 to a quantity you can measure, compute or draw — that is where exam questions come from.
  • Reproduce the core statement of H1299 from memory before moving on to harder problems.

Reference excerpt

H1299, also known as NCI-H1299 or CRL-5803, is a human non-small cell lung carcinoma cell line derived from the lymph node, which is widely used in research. As with other immortalized cell lines, H1299 cells can divide indefinitely. These cells have a homozygous partial deletion of the TP53 gene and as a result, do not express the tumor suppressor p53 protein which in part accounts for their proliferative propensity. These cells have also been reported to secrete the peptide hormone neuromedin B (NMB), but not gastrin-releasing peptide (GRP).

References

External links Cellosaurus entry for H1299

Worked examples

Example 1 — a first encounter with H1299

Start with the simplest possible case. Write down what H1299 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 H1299 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 H1299 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 H1299

In research
H1299 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 H1299 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
H1299 is common in secondary-school and first-year university syllabi. It links to neighbouring topics Cancer cell lines, Human cell lines, Lung cancer cell lines, so understanding it makes those chapters shorter.
In everyday life
Look for H1299 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 H1299 in 20 minutes

  1. Read the reference excerpt below once, without taking notes.
  2. Close the page and write down what H1299 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 H1299 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is H1299 in simple terms?

H1299, also known as NCI-H1299 or CRL-5803, is a human non-small cell lung carcinoma cell line derived from the lymph node, which is widely used in research. As with other immortalized cell lines, H1299 cells can divide indefinitely.

Why does H1299 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 H1299?

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 H1299.

Tags

  • Cancer cell lines
  • Human cell lines
  • Lung cancer cell lines
  • Oncology stubs

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