Progesterone, which regulates cyclical changes in the endometrium of the uterus and maintains a pregnancy The letters α and β[18] denote absolute stereochemistry at chiral centers—a specific nomenclature distinct from the R/S convention[19] of organic chemistry to denote absolute configuration of functional groups, known bey Cahn–Ingold–Prelog priority rules. The R/S https://cooperative-camellia-mjl8c7.mystrikingly.com/blog/en-iyi-tarafi-peptid-steroid