Freezing resistance in some Antarctic fishes.
Measurements of serum freezing points in three Antarctic marine fishes indicated that they do not freeze in the -1.87 degrees C seawater because their blood is isosmotic to seawater. Concentrations of sodium chloride, urea, and free amino acids in the serum accounted for only half of the freezing-point depression of the serum. A protein containing carbohydrate was isolated which accounted for 30 percent of the freezing-point depression of the serum.
D000596:Amino Acids / Q000097:blood; D000818:Animals; D001798:Blood Proteins; D005399:Fishes; D005615:Freezing; D006023:Glycoproteins / Q000097:blood; D008386:Marine Biology; D009994:Osmolar Concentration; D012965:Sodium Chloride / Q000097:blood; D014508:Urea / Q000097:blood
D000596:Amino Acids; D001798:Blood Proteins; D006023:Glycoproteins; D012965:Sodium Chloride; D014508:Urea