Figure - PMC

Skip to main content

An official website of the United States government

Here's how you know

Here's how you know

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.

View full-text article in PMC

. 2021 Feb 3;13(4):evab016. doi: 10.1093/gbe/evab016

Search in PMC
Search in PubMed
View in NLM Catalog
Add to search

© The Author(s) 2021. Published by Oxford University Press on behalf of the Society for Molecular Biology and Evolution.

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0/), which permits non-commercial re-use, distribution, and reproduction in any medium, provided the original work is properly cited. For commercial re-use, please contact journals.permissions@oup.com

PMC Copyright notice

Fig. 6. — Codon usage correlates with tRNA gene number and transcriptomic GC content in birds. Amino acid usage in codons of protein-coding genes (y-axis) are plotted against the number of tRNA genes per isotype (abbreviated by three-letter code) (x-axis) for (A) chicken, (B) zebra finch without (–TE), and (C) with (+TE) TE-associated tRNA genes. Regression (red line), 95% confidence interval (grey area), Spearman’s rank correlation coefficients (rho) and P values (P) are shown. For (D) chicken and (E) zebra finch, the effective number of codons (N_c) per protein-coding gene (N, y-axis) (black points) is plotted against the proportional GC content at the third codon position (x-axis). The red curve indicates the expected relationship if mutational biases affect codon usage.