passages.id: split_4_test_1588_passage
passages.type: progene_text
passages.text: In comparison with KChIP2.1 , coexpression of KChIP2.2 with human Kv4 channels in mammalian cells slowed the onset of Kv4 current inactivation ( 2-3 - fold ) , accelerated the recovery from inactivation ( 5 - 7 - fold ) , and shifted Kv4 steady - state inactivation curves by 8-29 mV to more positive potentials .