passages.id: split_4_test_1215_passage
passages.type: progene_text
passages.text: Thus , agonist - induced activation of endogenous beta(2)-adrenergic , prostaglandin E(2) , M(1) Ach , and somatostatin receptors induced arrestin-2 - GFP redistribution to early endosomes , whereas P2y(1) and P2y ( 2 ) purinergic and AT1 angiotensin receptor activation did not .