eGFP mRNA is synthesized using T7 High Yield RNA Transcription Kit (Cat KA7469) and modified with Cap 1 Capping System (Cat U0857) to achieve a mature mRNA structure with a 5 Cap 1 structure and a 3 poly(A) tail. When transfected into cells, it expresses intense green fluorescence and can serve as a control for studying the transfection and expression of target genes in mammalian cells.