*2.6. Self-Protective Proteins*

When danger or other stresses arise, a large secretion of mucus occurs as an emergen<sup>t</sup> self-protective reaction. According to our GO and KEGG data, some of the mucus-enriched proteins identified relate to immunization or prevention mechanisms against harmful or invading organisms. Therefore, we have identified these as self-protective proteins of jellyfish mucus. On the whole, 11 metalloproteinases, 4 serine proteinase inhibitors, 3 superoxide dismutases (SODs) and 3 complements were successfully scanned (Table 2, Supplementary Table S1).

**Table 2.** Summary of self-protective proteins enriched in mucus from the jellyfish *A. coerulea*.



**Table 2.** *Cont.*
