This part can express GFP well in Aspergillus niger. So we call it eGFP. We add a linker GSGSGSGSGS after the prefix so that someone who wants to make a fusion protein can ligate their part before our part easily.
Notes
We design a linker after the prefix and codon-optimize for eukarya.
Source
This part comes from jellyfish, and codon optimized for eukaryotes.