The invention belongs to the field of biological detection, and particularly relates to a blood
protein characteristic polypeptide, a detection kit and application of the blood
protein characteristic polypeptide to identification of adulteration and
weight gain of
hirudo nipponia. And the sequence of the blood
protein marker polypeptide is LLGNVIVVVLAR. On the basis of constructing a species marker polypeptide identification method, a
heterologous blood protein
traceability analysis strategy is introduced,
beta globin in blood of common
livestock such as pigs, cattle, sheep, horses, donkeys and the like is subjected to
multiple sequence alignment, and highly conservative species-independent marker polypeptide is screened out as a
chemical marker; and a multi-reaction monitoring (MRM) non-standard quantitative
peak area ratio judgment and detection method based on a liquid
chromatography-
triple quadrupole mass spectrometry technology is established, so that a scientific judgment basis is provided for the problem of blood
doping and weight increment.