in competitive insulin binding to intact cells , [ leua3 ] - , [ leub24 ] - , [ serb24 ] -insulin , and mini-proinsulin ( [ b ( 1-29 ) -ala-ala-lys-a ( 1-21 ) ] -insulin ) had the same relative binding activity in both the patient 's and the control cells , but proinsulin and igf-i were markedly less able to displace 125i-insulin in the patient 's cells .
C0021641
insulin
C0033362
proinsulin