55-Tyr-pth (42-55) 55-Tyrosyl-parathyroid hormone (42-55) 97613-65-5 Hpth (42-55), 55-tyr- L-Tyrosine, L-alanyl-L-prolyl-L-arginyl-L-alpha-aspartyl-L-alanylglycyl-L-seryl-L-glutaminyl-L-arginyl-L-prolyl-L-arginyl-L-lysyl-L-lysyl-, (+-)- Parathyroid hormone (42-55), 55-tyr-