Table I. The number of spectra and proteins identified in each of the 18 mass-spectrometry proteomics samples.

Sample description	Sample label	Number of spectra mapped to proteins	Number of unique proteins identified
Pseudocoelomic fluid	Pseudo	1,549	118
Male intestinal tissue	M-F1	2,061	473
	M-F2	2,352	583
	M-F3	1,799	569
	M-F4	2,736	563
	M-F5	2,625	522
	M-F6	3,117	454
	M-F7	3,019	374
Female intestinal issue	F-F1	3,003	562
	F-F2	2,898	638
	F-F3	2,423	598
	F-F4	3,045	563
	F-F5	3,214	512
	F-F6	3,145	435
	F-F7	3,292	353
Female intestinal tissue, 5K-50K pellet	P2 pellet	3,162	642
Lumen wash, PBS	PBS perfusate	2,910	134
Lumen wash, PBS + 4 m urea	4MU perfusate	4,712	295
All combined	All	51,062	1,048