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Table 1
Accession Numbers and Proposed Classification of Proteins Used in This Study
Species	Accession number	Database	Proposed classification	Reference

EUKARYOTA
Vertebrata
Bos taurus	P83095	Swiss-Prot	LACTB	[12]
Bos taurus	XP_601949	RefSeq	LACTB-like protein 2
Canis familiaris	XP_544713	RefSeq	LACTB	[47]
Danio rerio	NP_001018429	RefSeq	LACTB
Fugu rubipes	SINFRUP00000138119	Ensembl	LACTB
Gallus gallus	Q5ZK12	Swiss-Prot	LACTB	[48]
Gallus gallus	XP_001232283	RefSeq	LACTB-like protein 2	[48]
Gasterosteus aculeatus	ENSGACP00000014046	Ensembl	LACTB
Homo sapiens	P83111	Swiss-Prot	LACTB	[9]
Homo sapiens	XP_934300	RefSeq	LACTB-like protein 2
Macaca mulatta	ENSMMUP00000004719	Ensembl	LACTB
Monodephis domestica	ENSMODP00000013893	Ensembl	LACTB
Mus musculus	Q9EP89	Swiss-Prot	LACTB	[11,13]
Mus musculus	XP_205950	RefSeq	LACTB-like protein 2
Oryctolagus cuniculus	ENSOCUP00000008608	Ensembl	LACTB
Oryzias latipes	ENSORLP00000009787	Ensembl	LACTB
Tetrodon nigroviridis	CAG03509	GenPept	LACTB-like protein 2	[49]
Tetrodon nigroviridis	GSTENP00015949001	Ensembl	LACTB	[49]
Xenopus tropicalis	ENSXETG00000009720	Ensembl	LACTB
Tunicata
Ciona intestinalis	ENSCING00000006798	Ensembl	LACTB	[50]
Echinodermata
Strongylocent. purpuratus	XP_781179	RefSeq	Esterase-like
Strongylocent. purpuratus	XP_781241	RefSeq	Esterase-like
Strongylocent. purpuratus	XP_789736	RefSeq	LACTB
Nematoda
Caenorhabditis briggsae	CAE57335	GenPept	LACTB-like protein 1	[51]
Caenorhabditis briggsae	CAE57450	GenPept	Esterase-like	[51]
Caenorhabditis briggsae	CAE59629	GenPept	Esterase-like	[51]
Caenorhabditis briggsae	CAE67822	GenPept	Esterase-like	[51]
Caenorhabditis briggsae	CAE73201	GenPept	Esterase-like	[51]
Caenorhabditis briggsae	CAE74593	GenPept	LACTB	[51]
Caenorhabditis briggsae	CAE75151	GenPept	LACTB-like protein 1	[51]
Caenorhabditis elegans	NP_001041033	RefSeq	LACTB	[52]
Caenorhabditis elegans	NP_495790	RefSeq	Esterase-like	[52]
Caenorhabditis elegans	NP_496176	RefSeq	Esterase-like	[52]
Caenorhabditis elegans	NP_496299	RefSeq	Esterase-like	[52]
Caenorhabditis elegans	NP_505821	RefSeq	LACTB-like protein 1	[52]
Caenorhabditis elegans	NP_509221	RefSeq	Esterase-like	[52]
Caenorhabditis elegans	NP_509969	RefSeq	LACTB-like protein 1	[52]
Platyhelminthes
Schistosoma japonicum	AAX27853, AAX25200	GenPept	LACTB
Mycetozoa
Dictyostelium discoideum	Q55CN2	Swiss-Prot	LACTB	[53]
Dictyostelium discoideum	XP_640123	RefSeq	LACTB-like protein 2	[53]
Dictyostelium discoideum	XP_640124	RefSeq	LACTB-like protein 2	[53]
Dictyostelium discoideum	XP_641364	RefSeq	LACTB-like protein 2	[53]

BACTERIA
α-proteobacteria
Bradyrhizobium japonicum	NP_770552	RefSeq	LPBP-B^a
Hyphomonas neptunium	YP_759849	RefSeq	LPBP-B^a
Maricaulis maris	YP_755834	RefSeq	LPBP-B^a
Mesorhizobium loti	NP_107127	RefSeq	LPBP-B^a
Oceanicaulis alexandrii	YP_755834	RefSeq	LPBP-B^a
Sphingopyxis alaskensis	YP_618034	RefSeq	LPBP-B^a
β-proteobacteria
Burkholderia gladioli	Q9KX40	Swiss-Prot	LPBP-B^a
Bacillae
Bacillus cereus	ZP_00239307	RefSeq	LPBP-B^a
Actinobacteria
Streptomyces sp. strain R61	P15555	Swiss-Prot		[22,23]
Salinispora tropica	ZP_01429613	RefSeq	LPBP-B^a

NOTE.- ^aClassified according to the scheme of Massova and Mobashery [3].
Peitsaro et al. BMC Evolutionary Biology 2008 8:26 doi:10.1186/1471-2148-8-26

Table 1