急！论文校稿求助

最近一篇文章接受了，要进行校稿。文章中有一句话是

Tissue factor (TF) and phosphatidylserine (PS) are important components of the blood clotting cascade, and their elevated levels support the intrinsic and extrinsic coagulation pathways and promote the formation of thrombi.

然后编辑部提了针对这句话提了一个问题，完全不明白是什么意思？请大师给解答一下

Could you please provide the grant number for TF, if any?