Sysmex Corporation

Sanai Tsunokuni

Hiroyuki Kabata

Rena Tsuruoka

Yukiko Miura

Kana Kawasaki

Atsushi Iwai

Disclosed is a method of liberating a peptide, the method comprising a step of bringing a self-aggregate of albumin containing a peptide incorporated therein into contact with a solution that contains a compound represented by Formula (I) or (II) defined in the specification at a concentration of 80 mM to 1000 mM and allowing the peptide to be liberated from the self-aggregate of albumin into the solution.

Method of liberating peptide and method of recovering peptide

Disclosed is a method of recovering a peptide including: mixing a liquid sample containing a complex of peptide and protein in blood with a reagent containing at least one selected from the group consisting of Zn, Ca, Li, Ba, Mg, Mn, and a metal compound that forms any of these metal ions to liberate the peptide from the protein in blood; and recovering the liberated peptide.

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Saitama, Japan

Sanai Tsunokuni