. 2012 Jan 26;7(1):e30688. doi: 10.1371/journal.pone.0030688

Table 4. Active caspases 3 and 7 of stallion spermatozoa stored during five days (day 1 D1 to day 5 D5) at 5°C FE fresh extended sperm, CC sperm processed through colloidal centrifugation.

	D1		D3		D5
	FE	CC	FE	CC	FE	CC
High activity%	27.9±31.8	28.3±32.6	18.9±15.9	18.2±25.3	30.2±28.9	28.3±22.9
Low activity%	43.7±27.7	48.6±35.3	37.9±15.0	42.61±9.7	34.6±30.7	34.6±24.4
Dead sperm%	28.6±17.7^a	23.3±19.7^a	43.5±4.5^b	40.8±8.8^b	35.4±18.8^ab	37.5±10.6^ab

High activity are spermatozoa with high caspase 3 an 7 activity, low activity are spermatozoa with low caspase 3 and 7 activity and dead sperm correspond to necrotic (Ethidium positive spermatozoa). Within a row values with different superscript differ statistically, a-b p<0.01. (means ± SD) Results are derived from 28 identical experiments (7 stallions, 4 ejaculates per stallion).