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Ehrlichia chaffeensis 28 kda outer membrane protein multigene family

CA 2407946 A1 · Owner: Research Development Foundation · Inventors: Walker, David H.; Yu, Xue-Jie

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Abstract From the Canadian patent

The 28-kDa outer membrane proteins (P28) of Ehrlichia chaffeensis are encoded by a multigene family consisting of 21 members located in a 23-kb DNA fragment in the genome of E. chaffeensis. Fifteen of these proteins are claimed herein as novel sequences. The amino acid sequence identity of the various P28 proteins was 20-83%. Six of 10 tested p28 genes were actively transcribed in cell culture grown E. chaffeensis RT-PCR also indicated that each of the p28 genes was monocistronic. These results suggest that the p28 genes are active genes and encode polymorphic forms of the P28 proteins. The P28s were also divergent among different isolates of E. chaffeensis. The large repertoire of …

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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.

Why it's free to use

  • Filed May 1, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 1, 2021.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 1, 2023.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMay 1, 2001
GrantedNo grant recorded
Term endedMay 1, 2021
Patent numberCA 2407946 A1
Classification (IPC)C12N15/31 +2 more

Timeline

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2002200420062008201020122014201620182020Application filedMay 1, 2001Term endedMay 1, 2021

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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.