A phylogram showing adenovirus (Ad) subgenus specific clusters indicated by letters A–F. Ad1 and Ad6 are included in cluster C. The subgenus F is divided into short and long fibre subclusters marked by L and S with the respective prototypes. The phylogenetic tree was reconstructed from the predicted amino acid sequences of the full length fibre gene of all important human adenovirus serotypes under the GenBank accession for subgenus A: Ad12 (x73487) and Ad31 (x76548); subgenus B: Ad3 (m12411), Ad7p (m23696), Ad7h (z48954), Ad11p (l08231), Ad11a (l08232), Ad14 (ab065116), Ad16 (u06106), Ad21 (u06107), Ad34p (u10271, ab073168), Ad34a (u10272), and Ad35 (u10272); subgenus C: Ad1 (ab125750), Ad2 (j01917), Ad5 (m18369), and Ad6 (ab125751); subgenus D: Ad8 (x74660), Ad9 (x74659), Ad15 (x72934), Ad17 (nc002067), Ad19p (u69130), Ad19a (u69131), and Ad37 (u69132); subgenus E: Ad4 (x76547); and subgenus F: Ad40 (l19443 and m28822) and Ad41 (x16583, m60327).