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. 2003 Jan 1;20(1):38–46. doi: 10.1093/molbev/msg011

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Fig. 4. — Multiple sequence alignment of the putative conserved esterase domains encoded by ORF1s in CR1-like non-LTR retrotransposons and other esterases. Solid arrowheads mark the catalytic serine-asparate-histidine triad. Ambiguous amino acids are denoted by Xs. GenBank protein identification numbers are as follows: CR1_PS (6576737), CR1 (2331058), Maui (4378024), NeuA (13876786, CMP-N-acetylneuramic acid synthetase from Streptococcus agalactiae), TesA (267107, Acyl-CoA thioesterase I from Escherichia coli), RGAE (7766904), rhamnogalacturonan acetylesterase from Aspergillus aculeatus), PAF-AH (2624421, platelet-activating factor acetylhydrolase from Bos taurus). Amino acid sequences of ORF1p proteins encoded by CR1-1_DR, CR1-2_DR, CR1-3_DR, CR1-1_TN, CR1_OL and L3 are deposited in Repbase Update