# What is Node in Bioinformatics? PDF Download

Learn *Node* definition in bioinformatics with explanation to study “What is Node”. Study node explanation with bioinformatics terms to review bioinformatics course for online degree programs.

## Node Definition

Connecting point where two adjacent branches join which represents an inferred ancestor of extant taxa.

Essential Bioinformatics by Jin Xiong

## Node Explanation

In a phylogenetic tree, the starting point of branch at which more than one branches meet and the ending point of branch i.e., the tip of branch termed as the node. The starting point known as internal node which represents the ancestor whereas the tips are known as external node which represents the taxa. The node is also known as taxonomic unit.

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