passages.id: split_5_test_661_passage
passages.type: progene_text
passages.text: Five other amino acids , Gly ( 663 ) , Gly ( 756 ) , Asp ( 777 ) , Gly ( 1306 ) , and Gly ( 1311 ) , are critical for Ycf1p function , and two residues , Glu ( 709 ) and Asp ( 821 ) , are unnecessary for Ycf1p biogenesis and function .