Table 1.

Under-represented toxin encoding transcripts from the Echis vgDbESTs potentially associated with venom function.

Identification	No. of ESTs	Species present	Activty	Possible venom function
Aminopeptidase	8	E. c. sochureki	Hydrolysis of the N-terminal region of peptides [82].	Potential interference with angiogenesis and blood pressure control [83,84].
	1	E. coloratus
Ectonucletotide pyrophosphatase/phosphodiesterase	2	E. coloratus	Hydrolysis of nucleotides and nucleic acids [85].	Interaction with platelet function [85]. Activity previously described in Echis carinatus [86].
	3	E. c. sochureki
5'-nucleotidase	3	E. coloratus	Cleavage of a wide variety of ribose and deoxyribose nucleotides [1].	Potential inhibitor of platelet aggregation [1]. Activity identified in a number of different lineages including Echis carinatus [86].
	2	E. p. leakeyi
	1	E. c. sochureki
Ectonucleoside triphosphate diphosphohydrolase 2 (E-NTPase 2)	2	E. coloratus	Hydrolysis of nucleoside-5'-triphosphates and diphosphates [87].	Potential inhibitor of platelet aggregation [87,88].