Table 1.

Shared proteins among the three ascidian species (Ca—Ciona sp., Ma—Molgula sp., Pa—Microcosmus sp.) per Universal Protein Resource Knowledgebase (UniProtKB) taxonomic sections: Bacteria and Metazoa.

UniProtKB Taxonomic Section 1	Species 2	Accession Number 3	Protein Description 4
Bacteria	Ca, Ma, Pa	A0A1E2TY30	Actin, cytoplasmic 2
	Ca, Ma	A0A2I6SAN9 A0A2D9B6R8 A0A368ML82	Ubiquitin Histone domain-containing protein Histidine kinase
	Ca, Pa	A0A0A8RA46 A0A293NCX8	Lysyl endopeptidase, EC 3.4.21.50 TAF domain-containing protein
	Ma, Pa	A0A2V2P8C5 A0A318CZJ6 A0A1C7PFN9	Tubulin domain-containing protein Myosin_tail_1 domain-containing protein Tubulin_C domain-containing protein
Metazoa	Ca, Ma, Pa	A0A287B5W2 A0A1W5BGH3	Trypsinogen isoform X1 Myosin-10 isoform X2
	Ca, Ma	A0A182L962 A0A2U3WDE6 A0A368GTV8 F6PP44 F6KMG7 F7D7P2 A0A2Y9E533 L7N0S7	Uncharacterized protein Histone H2B Ribosomal protein S3 Fructose-bisphosphate aldolase, EC 4.1.2.13 Actin Uncharacterized protein Uncharacterized protein LOC101342124ATP synthase subunit alpha
	Ca, Pa	F6SM47 B0LXF7 A0A1W2W3E0 A0A1W5BMF0 A2SY09 A0A1W3JRI0 A0A1W3JCQ2 A0A1W3JCW3	Dolichyl-diphosphooligosaccharide--protein glycosyltransferase 48 kDa subunit, Oligosaccharyl transferase 48 kDa subunit Aprotinin Tropomyosin, smooth muscle/fibroblast CTM1-like isoform X1 (tropomyosin, smooth muscle/fibroblast CTM1-like isoform X2) Talin-2 isoform X1 Actin (act protein isoform X1) r27a protein isoform X1 Glial fibrillary acidic protein isoform X1P-selectin-like
	Ma, Pa	L5K7V0 N6TCR8 A0A2U3Z9L8 Q95PQ7 A0A091CUF9 A0A212D7H3 A0A074ZCV8	Tubulin beta-2C chain Uncharacterized protein LOW QUALITY PROTEIN: actin, gamma 1 Intermediate filament protein C Keratin, type II cytoskeletal 1 MYH1 Uncharacterized protein

¹ Taxonomic subsection of the UniProtKB where proteins were retrieved; ² Ascidian species where proteins were found: Ca—Ciona sp., Ma—Molgula sp., Pa—Microcosmus sp; ³ Accession numbers of the identified proteins; ⁴ Brief description of the identified proteins.