A fragment of the third component of human complement with anaphylatoxin activity.

Amino Acids/analysis Animals Arginine/analysis Autoanalysis Carboxypeptidases Chromatography, Gel Complement System Proteins Electrophoresis Electrophoresis, Disc Glutamates/analysis Glycine/analysis Guinea Pigs Humans Hydrogen-Ion Concentration Hydroxylamines Leucine/analysis Molecular Weight Muscle Contraction Muscle, Smooth/drug effects Peptide Hydrolases Peptides/analysis,isolation & purification,pharmacology Serine/analysis Stimulation, Chemical Sulfhydryl Compounds/analysis Toxins, Biological/pharmacology Trypsin Ultracentrifugation

Amino Acids Glutamates Hydroxylamines Peptides Sulfhydryl Compounds Toxins, Biological Serine Complement System Proteins Arginine Carboxypeptidases Peptide Hydrolases Trypsin Leucine Glycine