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Table 2 HIV-1 nucleotide composition of genome segments

From: The biased nucleotide composition of the HIV genome: a constant factor in a highly variable virus

HIV-1 genome segmenta Length (nt) A (%) C (%) G (%) U (%)
LTR (R3-U-R5) 635 25.0 24.4 27.2 23.3
Gag-ORF 1503 36.9 19.6 24.5 19.1
Pol-ORF 3012 38.9 16.5 22.8 21.9
Env-ORF 2571 34.7 17.1 24.0 24.3
Vif-ORF 579 36.1 18.0 24.0 21.9
Vpr-ORF 292 32.5 18.5 26.7 22.3
Tat-ORF 306 33.0 23.9 24.2 19.0
Rev-ORF 351 29.9 23.1 28.2 18.8
Vpu-ORF 249 38.6 11.7 26.5 23.3
Nef-ORF 621 30.6 21.3 28.2 20.0
  1. aHXB2 reference strain (GenBank acc. no. K03455).