JustBio Codon Usage Batch Codon-Usage Input Form Calculates %GC and codon usage rates from a list of sequences. Paste your sequence list in FASTA format: Example: >name and information ACTGCACTAGC.... >name and information GTAGCAGCACTA... Options: Extract ORF: YES NO (are your sequences ORFs or cDNAs?) Note: Only in direct orientation. Codon table: Standard Genetic Code Vertebrate Mitochondrial Yeast Mitochondrial Invertebrate Mitochondrial Echinoderm Mitochondrial Alternative Yeast Nuclear