Collagen's triglycine repeat number and phylogeny suggest an interdomain transfer event from a Devonian or Silurian organism into Trichodesmium erythraeum.

胶原蛋白的三甘氨酸重复次数和系统发育表明，泥盆纪或志留纪生物体发生了跨域转移事件，进入了红毛束毛虫（Trichodesmium erythraeum）