This invention belongs to the technical field of separation and extraction of bioactive components, specifically relating to a method for separating
intracellular water-soluble proteins from *
Hydrocotyle erythrorhizon*, comprising the following steps: Step 1, preparation of extraction medium: preparing a
copolymer solution from an amphiphilic temperature-responsive block
copolymer; Step 2, mixing and
permeation: mixing *
Hydrocotyle erythrorhizon* algal
powder with the
copolymer solution prepared in Step 1 to form a mixed
slurry, and stirring for 30 to 180 minutes; Step 3, thermally triggered separation: heating to 32°C to 45°C, maintaining the temperature and allowing it to stand for 10 to 60 minutes to allow the
system to separate into phases, and collecting the condensed phase rich in water-soluble proteins; Step 4,
protein recovery:
dialysis and
drying the condensed phase collected in Step 3 to obtain the
protein product. This invention, by employing a temperature-responsive block copolymer, integrates the gentle disruption of
cell walls, selective capture, and thermally triggered preliminary separation of
intracellular water-soluble proteins from *
Hydrocotyle erythrorhizon* into a continuous aqueous process, which is beneficial for maintaining
protein activity.