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Fig. 5 | BMC Plant Biology

Fig. 5

From: Chloroplast gene expression level is negatively correlated with evolutionary rates and selective pressure while positively with codon usage bias in Ophioglossum vulgatum L

Fig. 5

Heat map of the correlation between codon usage bias and gene expression level (56 filtered genes). Effective number of codons (ENC); the tRNA adaptation index (tAI). The numbers on the upper triangular are correlation values (Spearman’s rank correlation coefficient). * represents significant at the 0.05 level

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