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# N50, L50, and related statistics

In computational biology, N50 and L50 are statistics of a set of contig or scaffold lengths. 

## Base pair

A base pair (bp) is a unit consisting of two nucleobases bound to each other by hydrogen bonds.

The Eli and Edythe L. Broad Institute of MIT and Harvard, often referred to as the Broad Institute, is a biomedical and genomic research center located in Cambridge, Massachusetts, United States.

## Computational biology

Computational biology involves the development and application of data-analytical and theoretical methods, mathematical modeling and computational simulation techniques to the study of biological, behavioral, and social systems.

## Contig

A contig (from contiguous) is a set of overlapping DNA segments that together represent a consensus region of DNA.

## Herfindahl index

The Herfindahl index (also known as Herfindahl–Hirschman Index, HHI, or sometimes HHI-score) is a measure of the size of firms in relation to the industry and an indicator of the amount of competition among them.

## Mean

In mathematics, mean has several different definitions depending on the context.

## Median

The median is the value separating the higher half of a data sample, a population, or a probability distribution, from the lower half.

## Nucleotide

Nucleotides are organic molecules that serve as the monomer units for forming the nucleic acid polymers deoxyribonucleic acid (DNA) and ribonucleic acid (RNA), both of which are essential biomolecules within all life-forms on Earth.

## Quantile

In statistics and probability quantiles are cut points dividing the range of a probability distribution into contiguous intervals with equal probabilities, or dividing the observations in a sample in the same way.

## Scaffolding (bioinformatics)

Scaffolding is a technique used in bioinformatics.

## Sequence assembly

In bioinformatics, sequence assembly refers to aligning and merging fragments from a longer DNA sequence in order to reconstruct the original sequence.

## References

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