1. Spectra corresponding to entries in protein identification files ‘Results Table 1 (SI Dataset 2) and Results Table 2’ (SI Dataset 3)

2. Results Table 1 (SI Dataset 2) Coral Host Proteins

3. MS/MS Fragmentation of FVDVTDKLSSATNTKTHDEF Found in v1.02821, from database: http://bioserv7.bioinfo.pbf.hr/Zoophyte/r egistration/login.jsp Match to Choloylglycine hydrolase Match to Query 29840: 12002-21.raw (F029840)

4. MS/MS Fragmentation of YKGSLTTPPCSEVVTWTVFKDPVSISER Found in adi_v1.16354, from database: http://bioserv7.bioinfo.pbf.hr/Zoophyte/r egistration/login.jsp Match to Carbonic anhydrase Match to Query 29840: 12002-21.raw (F029840)

5. MS/MS Fragmentation of DLTDYLMKILTER Found in adi_v1.13367, from database: http://bioserv7.bioinfo.pbf.hr/Zoophyte/r egistration/login.jsp Match to Actin Match to Query 29840: 12002-11.raw (F029842)

6. MS/MS Fragmentation of NLEAKDEDASER Found in adi_v1.08398, from database: http://bioserv7.bioinfo.pbf.hr/Zoophyte/re gistration/login.jsp Match to Tropomyosin Match to Query #29835: 12002-01.raw (F029835)

7. MS/MS Fragmentation of SLENSETQASKR Found in adi_v1.12307, from database: http://bioserv7.bioinfo.pbf.hr/Zoophyte/re gistration/login.jsp Match to Tropomyosin Match to Query #29835: 12002-01.raw (F029835)

8. MS/MS Fragmentation of KGLIPAMQDEVLQQA Found in adi_v1.22045, from database: http://bioserv7.bioinfo.pbf.hr/Zoophyte/re gistration/login.jsp Match to Troponin C Match to Query #29840: 12002-21.raw (F029840)

14. MS/MS Fragmentation of TGKVADDLDLVKHDVR Found in adi_v1.15901, from database: http://bioserv7.bioinfo.pbf.hr/Zoophyte/re gistration/login.jsp Match to Calcium-binding protein Match to Query #29835: 12002-01.raw (F029835)

15. MS/MS Fragmentation of VFDKDGNGFISAAELR Found in adi_v1.01102, from database: http://bioserv7.bioinfo.pbf.hr/Zoophyte/re gistration/login.jsp Match to Calmodulin Match to Query #29835: 12002-01.raw (F029835)

24. Results Table 2 (SI Dataset 3) Algal Symbiont Proteins

27. MS/MS Fragmentation of GLFIIDDKGILR Found in Q5E947 Match to Peroxiredoxin Match to Query: uniprot_sprot_130220.fasta File Name: 12002-01.raw (F029773)

28. MS/MS Fragmentation of GLFIIDDKGTLR Found in Q6DV14 Match to Peroxiredoxin Match to Query: uniprot_sprot_130220.fasta File Name: 12002-21.raw (F029775)

31. MS/MS Fragmentation of VFDKDGNGFISAAELR Found in Q9XZP2 Match to Calmodulin Match to Query: uniprot_sprot_130220.fasta File Name: 12002-31.raw (F029778)

32. MS/MS Fragmentation of DAEANAEEDRK Found in B0KIS5 Match to Chaperone protein DnaK (HSP70) Match to Query: uniprot_sprot_130220.fasta File Name: 12002-21.raw (F029775)

33. MS/MS Fragmentation of DAEANAEEDKR Found in Q7UM31 Match to Chaperone protein DnaK (HSP70) Match to Query: uniprot_sprot_130220.fasta File Name: 12002-21.raw (F029775)