PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 10737616-8 2000 The MAP kinases may not be strictly proline specific: p38 phosphorylated the nonproline sites Ser185, Thr245, Ser305, and Ser356, whereas ERK2 was the most strict. Proline 36-43 mitogen-activated protein kinase 1 Homo sapiens 54-57