>5AUL_1|Chain A|Phosphatidylinositol 3-kinase regulatory subunit alpha|Homo sapiens (9606) GSEDLPHHDEKTWNVGSSNRNKAENLLRGKRDGTFLVRESSKQGCYACSVVVDGEVKHCVINKTATGYGFAEPYNLYSSLKELVLHYQHTSLVQHNDSLNVTLAYPVYA >5AUL_2|Chain B|T-cell-specific surface glycoprotein CD28|Homo sapiens (9606) SDYMNMTP