Table 1. Relative mRNA abundance of a various metabolic enzymes in stored and ejaculated sperm.

Protein	Ratio stored/ejaculated
Glyceraldehyde-3-phosphate dehydrogenase 2	61***
Aldose reductase	6.9**
Aspartate aminotransferase	5.6*
Phosphate carrier protein	4.0*
Fumarate hydratase	2.0
Hexokinase type 2	0.8
Cytochrome c	0.4
Bifunctional ATP-dependent dihydroxyacetone kinase	0.4
Ornithine aminotransferase	0.1

^***p ≤ 0.001, ^**p ≤ 0.01, ^*p ≤ 0.05.