19962
In the present investigation , a collection of PTH ( 1 - 34 ) and PTHrP ( 1 - 34 ) peptide analogs were evaluated in orthogonal hPTH1R functional assays capturing Gs - and Gq - signaling , beta - arrestin recruitment , ERK1 / 2 phosphorylation and receptor internalization to further define patterns of of PTH1R signaling they stimulate and to further establish peptide domains contributing to agonist activity .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 None