Table 2. CPO-Labeled Human Albumin Peptides^a.

start−end	Mr	sequence	CPO-labeled
139−144	1234.6	K(CONH2)Y*LYEIAR	Y138
146−159	1877.9	HPYFY*APELLFFAK	Y150
161−174	1797.8	Y*KAAFTECCQAADK	Y161
390−402	1791.8	QNCELFEQLGEY*K	Y401
411−413	547.2	Y*TK	Y411
446−466	2653.2	MPCAEDY*LSVVLNQLCVLHEK	Y452

^aPeptide KYLYEIAR was carbamylated on the N-terminal Lys by degradation products in urea, adding a mass of 43. Chorpyrifos oxon adds a mass of 136 to the labeled tyrosine.