ER-EGFP mRNA encodes a fusion protein comprising an endoplasmic reticulum (ER) targeting signal sequence and enhanced green fluorescent protein (EGFP) EGFP is a widely used fluorescent marker protein for biological imaging By fusing EGFP to the ER signal sequence dynamic changes in the ER can be observed in real-time in live cells making it particularly useful for studying the structure function and interactions of the ER with other cellular organelles ER-EGFP s efficient fluorescent properties and specific localization to the ER position it as an ideal tool for studying ER-related processes The EZ Cap ER-EGFP Probe mRNA (m1 ) is provided at 1 mg/mL specifically designed for targeted expression of a green fluorescent protein label at the ER This mRNA is synthesized through co-transcriptional capping resulting in a Cap 1 structure The incorporation of m1 modifications poly(A) tail significantly enhances mRNA stability and lifetime both in vitro and in vivo