Table 3. SFPs differentially expressed with respect to male age, sperm velocity or age: velocity interaction.

Category	GI#	Protein name	Comparison or Age-velocity category
Significant in FDR-corrected 2-way ANOVAs
Age: Velocity	46048932	sodium-dependent phosphate transport protein 2B	OF > YF; OF > YS
Age: Velocity	71895709	glycine-tRNA ligase	OF > YF
Age: Velocity	45382907	receptor-type tyrosine-protein phosphatase eta precursor	OF > YF
Age: Velocity	513204938	fibulin-2	OF > OS; YS > OS
Age: Velocity	160333842	proto-oncogene tyrosine-protein kinase ROS precursor	OF > OS; OF > YF; OF > YS
Age: Velocity	45382785	beta-galactoside-binding lectin	YF > YS
Age	45383337	SPARC precursor	Y > O; YF > OS; YS > OS; YS > OF
Age	303227902	acetyl-CoA acetyltransferase, cytosolic	Y > O
Age	60302752	ras-related protein Rab-11B	Y > O; YF > OS
Identification restricted by age and/or velocity
Age	56605916	protein tyrosine phosphatase type IVA 1	Old only
Age: Velocity	513237884	neuroblast differentiation-associated protein AHNAK-like	Old Fast only
Age: Velocity	45383816	protein S100-A6	Old Fast only
Age: Velocity	45384028	protein S100-A11	Old Fast only
Age: Velocity	118085711	acyl-CoA-binding protein	Old Fast only
Age: Velocity	160358333	neo-calmodulin	Old Fast only
Age: Velocity	326368309	guanine nucleotide-binding protein (gamma-10)	Old Fast only
Age: Velocity	363730875	myosin regulatory light chain 2,	Old Fast only
Age: Velocity	363745926	guanine nucleotide-binding protein subunit gamma-7-like	Old Fast only
Age: Velocity	478247057	microsomal glutathione S-transferase 3	Young Fast only
Age: Velocity	363742947	nitrilase homolog 1 isoformX1	Young Fast only
Velocity	71895387	inosine-5′-monophosphate dehydrogenase 2	Slow only

OF = Old Fast; YS = Young Slow; YF = Young Fast; O = Old; S = Slow.