CSH2 GI:12408694 chorionic somatomammotropin hormone 2 isoform 3 1 maagsrtsll lafallclpw lqeagavqtv plsrlfdham lqahrahqla 50 51 idtyqefrle dgsrrtgqil kqtyskfdtn shnhdallkn ygllycfrkd 100 101 mdkvetflrm vqcrsvegsc gf