the rapid plasma disappearance of as-hcg could not be accounted for by renal clearance into urine , since less than 0.05 % of the as-hcg injected was excreted in the urine , nor could it be explained by degradation by plasma proteases , since as-hcg was not appreciably degraded during incubation in human serum at 37 c for 3 h .
C0032105
plasma
C0229671
serum