The apical annuli of Toxoplasma gondii are composed of coiled-coil and signalling proteins embedded in the inner membrane complex sutures.

Engelberg K, Chen CT, Bechtel T, Sanchez Guzman V, Drozda AA, Chavan S, Weerapana E, Gubbels MJ
Cell Microbiol. 2020 Jan;22(1):e13112. doi: 10.1111/cmi.13112. Epub 2019 Sep 10. PubMed Article

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