Table 2.

Mean concentrations of DPs in plasma and CSF and their ratio

DP	Plasma Mean (fmol/µl) ± SD	CSF Mean (fmol/µl) ± SD	Ratio Plasma/CSF per patient Mean ± SD	Number of patients
Carnosine	325.05 ± 487.58	14.10 ± 9.47	25.04 ± 26.62	3
Anserine	85.83 ± 32.22	55.63 ± 38.50	2.55 ± 1.73	11
Gly-Asp	49.99 ± 27.26	17.86 ± 8.68	2.94 ± 1.15	43
Asp-Gln	40.51 ± 48.46	6.33 ± 2.13	6.12 ± 5.04	7
γ-Glu-ε-Lys	25.28 ± 9.22	12.56 ± 7.01	2.90 ± 0.68	2
Ala-Glu	21.47 ± 14.91	1.55 ± 1.41	23.58 ± 30.59	42
Ser-Ala	21.20 ± 53.82	0.76 ± 1.43	152.91 ± 213.91	6
Glu-Glu	16.29 ± 13.38	0.70 ± 0.77	43.47 ± 49.46	16
Gly-Phe	14.28 ± 24.41	0.51 ± 0.54	497.73 ± 497.55	2
Gly-Glu	9.49 ± 6.37	1.14 ± 0.76	11.11 ± 6.27	22
Glu-Ser	8.20 ± 14.55	2.17 ± 1.79	4.49 ± 5.39	12
Ser-Gln	6.13 ± 5.47	1.64 ± 0.72	5.39 ± 4.99	3
Gly-Pro	5.65 ± 7.03	4.48 ± 3.69	1.31 ± 1.37	42
Pro-Gly	5.19 ± 4.21	1.30 ± 0.74	4.86 ± 4.67	38
Ala-Ala	3.83 ± 4.82	0.90 ± 1.15	5.66 ± 3.25	17
Phe-Ala	0.97 ± 0.82	0.07 ± 0.06	6.72 ± 0.00	1
Val-Tyr	0.38 ± 0.32	0.15 ± 0.13	6.48 ± 11.00	11

Mean of the ratios of DPs between plasma and CSF individually for each patient