PTH GI:4506267 parathyroid hormone preproprotein 1 mipakdmakv mivmlaicfl tksdgksvkk rsvseiqlmh nlgkhlnsme 50 51 rvewlrkklq dvhnfvalga plaprdagsq rprkkednvl veshekslge 100 101 adkadvnvlt kaksq