Table 3.

Amyloid β 1–42 identified peptide related impurities.

Entity	Amino Acid Sequence	Parent Mass (/m/z)	Charged State
Aβ1-42	D A E F R H D S G Y E V H H Q K L V F F A E D V G S N K G A I I G L M V G G V V I A	1129.57	+4
Variant 1	D A E F R H D S G Y E V H H Q K L V F F A E D V G S N K G A I I G L M V G G	1133.32	+4
Variant 2	H D S G Y E V H H Q K L V F F A E D V G S N K G A I I G L M V G G V V I A	1299.33	+3