Localization of diversified relaxin gene transcripts in the brain of eels

► Three relaxin3-like cDNAs were isolated from the brain of the Japanese eel. ► Three relaxin3-like cDNAs were named as eel RLN3a, RLN3b and RLN. ► RLN3a and -b transcripts were abundant in the middle-posterior region of the brain. ► RLN transcripts were detected in all brain areas at levels lower than RLN3a found in the brain 3.