NJplot

NJplot renders binary phylogenetic trees produced by PHYLIP programs to visualize and interpret evolutionary relationships among sequences and taxa.

Key Features:

• Visualization of Binary Trees: Renders binary trees, with emphasis on representing phylogenetic relationships from PHYLIP-generated files.
• Integration with Sequence Retrieval Systems: Interfaces with the WWW-Query sequence retrieval system to access nucleotide and protein databases.
• Database Format Support: Supports queries and retrieval in EMBL/GenBank/DDBJ formats for nucleotides and NBRF/PIR formats for proteins.
• Complex Query Building: Enables construction of intricate queries to retrieve specific nucleotide or protein sequences.
• Cross-Referencing and Data Integration: Facilitates cross-referencing across different data banks to link retrieved sequences to related biological information.
• Functional Zones Access: Provides access to functional zones of biological interest within sequences for targeted analysis.
• Reusable Sequence Lists: Manages reusable sequence lists to save and reuse specific datasets for repeated analyses.
• Dedicated Helper Applications: Includes helper applications for visualizing sequence alignments and phylogenetic trees.
• Integration with Multivariate Methods: Links with multivariate statistical methods for analyses such as codon usage pattern studies.

Scientific Applications:

• Phylogenetic visualization: Produces graphical representations of evolutionary trees for interpretation of lineage relationships.
• Evolutionary analysis: Supports studies of species evolution, genetic variation, and biodiversity through tree-based interpretation.
• Genomic sequence retrieval and integration: Combines sequence retrieval from EMBL/GenBank/DDBJ and NBRF/PIR with tree visualization for integrated genomic analyses.
• Codon usage and multivariate analysis: Supports complementing phylogenetic investigations with multivariate analyses of codon usage patterns.

Methodology:

Reads PHYLIP tree files and renders binary phylogenetic trees; interfaces with WWW-Query to retrieve sequences from EMBL/GenBank/DDBJ and NBRF/PIR; supports complex query construction, cross-referencing across databanks, management of reusable sequence lists, alignment visualization via helper applications, and integration with multivariate methods for codon usage analysis.