N50L50
N50L50 is a term encountered in genome assembly evaluation to describe a contiguity measure that combines the N50 and L50 statistics. There is no universal definition, and usage varies by source. In many cases, N50L50 refers to reporting the two standard metrics together (often written as N50 and L50 or as N50/L50). In other contexts, it denotes a derived single value such as a ratio (N50/L50) or a product (N50×L50). Because there is no standard definition, readers should consult the original publication or tool documentation for the exact meaning.
Calculation basics: N50 is the length of the contig such that 50% of the assembly is contained
Interpretation and use: A higher ratio or product suggests greater contiguity per contig or greater aggregate
Limitations: No single metric fully captures assembly accuracy. N50/L50-based measures can be biased by a few
See also: N50, L50, NGA50, NG50, QUAST, BUSCO.
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