{{include page="BioinformaticsGlossary"}}
----
====== L ======

== lambda （λ，BLAST程序的一个统计参数） ==
A statistical parameter used in calculating BLAST scores that can be thought of as a natural scale for scoring system. The value lambda is used in converting a raw score (S) to a bit score (S').

== LAN（局域网） ==
Local area network.

== Likelihood（似然性） ==
The hypothetical probability that an event which has already occurred would yield a specific outcome. Unlike probability, which refers to future events, likelihood refers to past events.

== Linear discriminant analysis ==
An analysis in which a straight line is located on a graph between two sets of data pointsin a location that best separates the data points into two groups.

== Local alignment（局部联配） ==
Attempts to align regions of sequences with the highest density of matches. In doing so, one or more islands of subalignments are created in the aligned sequences.

== Log odds score（概率对数值） ==
The logarithm of an odds score. See also Odds score.

== Low Complexity Region (LCR) （低复杂性区段） ==
Regions of biased composition including homopolymeric runs, short-period repeats, and more subtle overrepresentation of one or a few residues. The SEG program is used to mask or filter LCRs in amino acid queries. The DUST program is used to mask or filter LCRs in nucleic acid queries.

----
CategoryResource