Chemerin (A). RARRES2 (mRNA) and (B). (chemerin protein)) and CMKLR1 ((C) (mRNA) and (D)(protein)) expression during embryo and postnatal development in chicken testes. Total RNA and proteins were extracted from testes of chicken at embryo day 17 (E17), hatching (E21), at 5 (D5), 10 (D10), 26 (D26), and 42 (D42)-day-old and finally at 40-week-old (W40). Gene expression and protein production were assessed by RT-qPCR and Western blotting, respectively. Data are means ± SEM of 10 testes from 10 different animals per stage. Different letters indicate a significant difference at p < 0.05.