relative copies

USAGE SUMMARY

The phrase "relative copies" is correct and usable in written English.
It can be used in contexts where you are discussing copies that are in relation to something else, such as in comparisons or measurements. Example: "The relative copies of the document were compared to determine which version was the most accurate."

✓ Grammatically correct

Science

Human-verified examples from authoritative sources

Exact Expressions

7 human-written examples

The relative copies of SF-1 to β-actin in H295R cells were calculated accordingly.

Environmental Health Perspectives

OATP1B2 and ABCC2 mRNA expression levels were calculated using the following equation: A (target gene relative copies) = B1 (target gene)/B2 (reference gene).

BioMed Research International

In our study, CNV detection would be leveraged on the reference genome, thus, copy numbers are reported more like relative copies comparing to the reference genome.

BMC Genomics

In contrast, relative copies in USPC samples had a mean (95% CI) of 162 (55.8–470) and ranged from 2.76 to 2745.

British Journal of Cancer

The mRNA levels were expressed as relative copies (% control) normalized against 18S mRNA (Ambion QuantumRNA™ 18S Universal Primers) and a standard curve constructed from serial dilutions of a purified CD164 cDNA fragment cloned by classical PCR.

BMC Cancer

To correct for variation in the input RNA concentration the relative gene copies were further normalised to the expression of the 18s rRNA gene by dividing the number of gene copies with the relative copies of 18s.

BMC Genomics

Human-verified similar examples from authoritative sources

Similar Expressions

53 human-written examples

Relative copy number of α2 and α1 gene can be deduced from the ratio of the two peaks.

Experimental and Molecular Pathology

The relative quantification of mRNA expression was performed by normalizing the expression value transformed in relative copy numbers (obtained from Cq values and with efficiency considered).

AMB Express

Quantitative reverse transcription polymerase chain reaction and the 2− ΔΔCt method were used to analyze the CAT gene relative copy numbers.

Gene

Two other members of the HA synthase gene family were expressed at very low relative copy number but showed no compensatory response in the Has2 knockouts.

Matrix Biology

Relative copy numbers were determined with the ΔΔCt method [69].

Plosone

Expert writing Tips

Best practice

When describing experimental results, clearly specify what the "relative copies" are relative to (e.g., a control gene, a reference sample) for clarity and reproducibility.

Common error

A common mistake is using "relative copies" without specifying the baseline for comparison. Always state clearly what the copies are relative to in your analysis to avoid ambiguity.

Linguistic Context

The phrase "relative copies" primarily functions as a noun phrase that describes the quantity of genetic material in comparison to a reference point. As seen in Ludwig's examples, this reference can be a control gene like β-actin or 18S rRNA.

Expression frequency: Uncommon

Frequent in

Science

100%

Less common in

News & Media

0%

Formal & Business

0%

Ludwig's WRAP-UP

In summary, the phrase "relative copies" is a grammatically sound term predominantly used within the scientific community to express gene or DNA sequence quantities in comparison to a reference point. As confirmed by Ludwig, it's crucial to define what the "relative copies" are relative to for clarity. When writing, be mindful of specifying the reference point to avoid ambiguity. Alternatives like "normalized expression" or "fold change" may be suitable depending on the context, as they express a similar idea.

More alternative expressions

Phrases that express similar concepts, ordered by semantic similarity:

proportional copies

Emphasizes the direct relationship in proportion between copies and a reference point.

comparative copies

Highlights the comparison between the number of copies across different samples or conditions.

normalized copy number

Indicates that the copy number has been adjusted relative to a control or standard.

adjusted copy number

Implies a mathematical or statistical adjustment to the copy number for accurate comparison.

copy number ratio

Focuses on the ratio of copy numbers between different genes or regions.

relative abundance of copies

Indicates the quantity of copies in relation to the total amount of material.

copy number variation

Refers to differences in copy number across individuals or samples.

comparative gene dosage

Addresses differences in gene copy numbers and their effects.

proportional representation of copies

Highlights how copies represent a fraction of the original content.

relative gene dosage

Focuses on how the number of gene copies impacts the expression.

FAQs

How are "relative copies" typically calculated in scientific research?

In scientific research, "relative copies" are often calculated using methods like the ΔΔCt method in qPCR, where the copy number of a target gene is normalized to a reference gene. This provides a measure of the target gene's abundance relative to the reference.

What does it mean when "relative copies" are reported as a percentage of control?

Reporting "relative copies" as a percentage of control means that the expression or abundance of a gene or DNA sequence is being compared to a control sample, which is set to 100%. Any value above or below 100% indicates the increase or decrease relative to that control.

Why is it important to use a reference gene when measuring "relative copies"?

Using a reference gene, also known as a housekeeping gene, is crucial for normalizing data and accounting for variations in sample preparation, RNA quality, and PCR efficiency. This ensures that any observed changes in the target gene's "relative copies" are due to actual biological differences and not experimental artifacts.

What are some alternatives to using "relative copies" when describing gene expression?

Instead of "relative copies", you can use terms like "normalized expression", "fold change" in expression, or "relative abundance" to describe gene expression levels. Ensure your choice accurately reflects the method used for quantification.