Sema
Sema is a catalog name for a GLP-1 receptor agonist analogue of human GLP-1(7–37), used in the literature as a laboratory tool for GLP-1 receptor signalling.
Medicinal-chemistry descriptions of this analogue include an aminoisobutyric acid substitution associated with resistance to DPP-4 cleavage, an arginine substitution, and a fatty-diacid chain on a lysine that increases albumin affinity. Lau et al., Journal of Medicinal Chemistry, 2015 (PMID 26308095) report the receptor-binding and in-vitro profile that research catalogs point at when they use this name. How to read that kind of figure is covered under receptor-binding papers.
Sema is not Terz and not GLP-3R. Identity and purity for a given vial are on the certificate of analysis.
The paper is a reference for what the name means in laboratory writing. It is not a set of instructions, and this note is not medical advice.