Table 1.

Distribution of 576 ESTs sequenced from S. c. edwardsii venom gland in toxin and toxin-like transcript, cellular protein, mitochondrial and hypothetical sequence clusters.

Transcripts category	Number of ESTs	Number of clusters	Redundancy (clones/cluster)	Representation over total clones (%)	Representation over matching clones (%)
Toxin	360	76	4.74	69.40	77
Cellular	107	106	1.04	20.65	23
Mitochondrial	9	9	1.00	1.73	-
Hypothetical	42	42	1.00	8.10	-

The variations observed among toxin isoforms in this library are not due to population level diversity as they are derived from the venom gland of a single snake