Table 1.

Summary of the results obtained in the proteomics analysis of sample collections C1–C3

	Sample collection # 1	Sample collection # 2	Sample collection # 3
N# proteins identified1	631	1557	805
N# of exosomal proteins2	23/34	32/34	29/34
CD9 (P21926)3	+8	+	+
CD63 (P08962)4	n.f.9	+	+
CD81 (P60033)5	+	+	+
ALPP (P05187)6	+	+	+
PZP (P20742)7	+	+	+

1: False discovery rate (FDR) ≤ 1% at the peptide level; 2: reference list of exosomal proteins as described in ref. 33; 3: CD9 antigen; 4: CD63 antigen; 5: CD81 antigen; 6: alkaline phosphatase, placental type; 7: pregnancy zone protein; 8: at least one unique peptide identified; 9: not found