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biology

LARGE

LARGE 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 LARGE rather than just read about it. In short: Xylosyl- and glucuronyltransferase LARGE1 is an enzyme that in humans is encoded by the gene LARGE1 (formerly LARGE). In 2024, a deep mutational scanning was conducted, which generated functional scores for all possible single nucleotide variants of the human LARGE1 coding sequence.

LARGE — main illustration
LARGE — illustration

Key takeaways

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

Reference excerpt

Xylosyl- and glucuronyltransferase LARGE1 is an enzyme that in humans is encoded by the gene LARGE1 (formerly LARGE). In 2024, a deep mutational scanning was conducted, which generated functional scores for all possible single nucleotide variants of the human LARGE1 coding sequence.

Function This gene, which is one of the largest in the human genome, encodes a member of the N-acetylglucosaminyltransferase gene family. The exact function of LARGE, a golgi protein, remains uncertain. It encodes a glycosyltransferase which participates in glycosylation of alpha-dystroglycan, and may carry out the synthesis of glycoprotein and glycosphingolipid sugar chains. It may also be involved in the addition of a repeated disaccharide unit. Mutations in this gene cause MDC1D, a novel form of congenital muscular dystrophy with severe mental retardation and abnormal glycosylation of alpha-dystroglycan. Alternative splicing of this gene results in two transcript variants that encode the same protein. LARGE may also play a role in tumor-specific genomic rearrangements. Mutations in this gene may be involved in the development and progression of meningioma through modification of ganglioside composition and other glycosylated molecules in tumor cells.

References

Further reading

External links GeneReviews/NCBI/NIH/UW entry on Congenital Muscular Dystrophy Overview

Illustrations

LARGE illustration
LARGE illustration
LARGE illustration
LARGE illustration
LARGE illustration

Worked examples

Example 1 — a first encounter with LARGE

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

In research
LARGE 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 LARGE 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
LARGE is common in secondary-school and first-year university syllabi. It links to neighbouring topics Genes on human chromosome 22, Human chromosome 22 gene stubs, so understanding it makes those chapters shorter.
In everyday life
Look for LARGE 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 LARGE in 20 minutes

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

Frequently asked questions

What is LARGE in simple terms?

Xylosyl- and glucuronyltransferase LARGE1 is an enzyme that in humans is encoded by the gene LARGE1 (formerly LARGE). In 2024, a deep mutational scanning was conducted, which generated functional scores for all possible single nucleotide variants of the human LARGE1 coding sequence.

Why does LARGE 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 LARGE?

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 LARGE.

Tags

  • Genes on human chromosome 22
  • Human chromosome 22 gene stubs

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