Table II. Pearson correlation analysis between sperm concentration and seminal plasma peptide abundance (LC-MS/MS data) for the 5 proteins identified as correlated in Table I. Pearson correlation coefficient and p value are indicated in the table.

Peptide sequence and modifications	Uniprot accession number	Gene name	Pearson correlation (r-value)	Significance (p, value)
dLLPNVcAFPMEk N-Term(TMT10Plex); C7(Carbamidomethyl); K13(TMT10Plex)	P49223	SPINT3	0.746	0.001
sGINcPIQk N-Term(TMT10Plex); C5(Carbamidomethyl); K9(TMT10Plex)	P61916	NPC2	0.778	0.0004
eVNVSPcPTQPcQLSk N-Term(TMT10Plex); C7(Carbamidomethyl); C12(Carbamidomethyl); K16(TMT10Plex)			0.753	0.001
aVVHGILMGVPVPFPIPEPDGck N-Term(TMT10Plex); C22(Carbamidomethyl); K23(TMT10Plex)			0.752	0.001
dcGSVDGVIk N-Term(TMT10Plex); C2(Carbamidomethyl); K10(TMT10Plex)			0.692	0.003
dkTYSYLNk N-Term(TMT10Plex); K2(TMT10Plex); K9(TMT10Plex)			0.595	0.015
lVVEWQLQDDk N-Term(TMT10Plex); K11(TMT10Plex)			0.549	0.028
nQSLFcWEIPVQIVSHL N-Term(TMT10Plex); C6(Carbamidomethyl)			0.312	0.24
eLPSLQHPNEQk N-Term(TMT10Plex); K12(TMT10Plex)	Q16610	ECM1	0.758	0.001
eVGPPLPQEAVPLQk N-Term(TMT10Plex); K15(TMT10Plex)			0.488	0.055
lDGFPPGRPSPDNLNQIcLPNR N-Term(TMT10Plex); C18(Carbamidomethyl)			0.377	0.149
tGVPcEAcPSNcEDk N-Term(TMT10Plex); C5(Carbamidomethyl); C8(Carbamidomethyl); C12(Carbamidomethyl); K15(TMT10Plex)	P54107	CRISP1	0.699	0.003
lVTDLPNVQEEIVNIHNALR N-Term(TMT10Plex)			0.411	0.113
sTSESTAALGcLVk N-Term(TMT10Plex); C11(Carbamidomethyl); K14(TMT10Plex)	P01859	IGHG2	0.653	0.006
tTPPMLDSDGSFFLYSk N-Term(TMT10Plex); K17(TMT10Plex)			0.319	0.228