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The properties and sequence of an oligomeric antigen of Treponema pallidum are presented. Antigen C1-5 assembles into oligomers of 140,000 and greater. The nucleotide sequence predicts an open reading frame for a protein monomer of 19,400, confirmed by amino-terminal sequencing of the recombinant antigen.

Primary structure of an oligomeric antigen of Treponema pallidum