抗体

1. Origins, structure, and basic meaning

• Structure: The spelling is 抗体, read こうたい, and it combines 抗, meaning resist, with 体, meaning body or substance.
• Basic usage: 抗体 is an antibody, a protein produced by the immune system to recognize and bind to a particular antigen.

2. Common pitfalls and similar expressions

• A protective immune role and a substance measured in a sample
  • Both examples use the form 抗体. In class it is an element of immune protection; in research it is a substance whose amount in a sample can be measured.
• Learning an immune mechanism and measuring quantity
  • 授業で抗体が体を守る仕組みを学んだ。 — In class, we learned how antibodies protect the body.
  • 研究者は試料に含まれる抗体の量を測定した。 — Researchers measured the amount of antibodies in the sample.