Haemoglobin receptor protein is intragenically encoded by the cysteine proteinase-encoding genes and the haemagglutinin-encoding gene of Porphyromonas gingivalis.

@article{Nakayama1998HaemoglobinRP,
  title={Haemoglobin receptor protein is intragenically encoded by the cysteine proteinase-encoding genes and the haemagglutinin-encoding gene of Porphyromonas gingivalis.},
  author={Kei-ichi I Nakayama and Dinath B Ratnayake and Takayuki Tsukuba and Tomoko Kadowaki and Kenji Yamamoto and Shuki Fujimura},
  journal={Molecular microbiology},
  year={1998},
  volume={27 1},
  pages={51-61}
}
The obligately anaerobic bacterium Porphyromonas gingivalis produces characteristic black-pigmented colonies on blood agar. It is thought that the black pigmentation is caused by haem accumulation and is related to virulence of the microorganism. P. gingivalis cells expressed a prominent 19 kDa protein when grown on blood agar plates. Analysis of its N-terminal amino acid sequence indicated that the 19 kDa protein was encoded by an internal region (HGP15 domain) of an arginine-specific cysteine… CONTINUE READING
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