pca was measured before and after incubation ( 4 hr at 37 degrees ) with endotoxin ( salmonella enteritidis lps , w or escherichia coli o111 : b4lps , w , 1 microgram/ml final concentration ) using a one-stage clotting assay and/or a two-stage amidolytic assay .
C0014264
endotoxin
C0023810
lps