Fig. 1.
![Fig. 1. Kinetics of DNA synthesis by GC and resting B cells. B cells were cultured for 10 days in the presence of CD40 MoAb, G28-5 (•), PMA with ionomycin (▵), or CM alone (○). [3H]thymidine uptake was measured after the intervals shown. (A) GC B cells; (B) GC B cells in the presence of CD32-L cells; (C) resting B cells in the presence of CD32-L cells. Data are mean cpm for cells purified from the same tonsil and representative of five experiments. Values for [3H]thymidine uptake by CD32-L cells alone (∼4,000 to 10,000 cpm) have been subtracted in (B) and (C).](https://ash.silverchair-cdn.com/ash/content_public/journal/blood/89/3/10.1182_blood.v89.3.919/8/bl_0021f1.jpeg?Expires=1735530213&Signature=PZCXkbdOXBjb4NanSQQAiWdfBiSitU68SvjnzgZJVCYFOmFNpYtYw-jGP2l3O5AGo~V5G6IxZHQ6d~pZ1T0dOEuLaoE70xFvCV32Jf4sB445LOzUts3nKnB~lg5YeWIDeAV7xcLerpgjkT732B-A-RPfO~6bq6DxK5CZ-a8yPtESWM8rUmbHpG1T-TbD-9~vYs2lnaxdhmOGN5YT5mTTDlbH4OaipsnkTk-qRC8O5GmF-hhCHdE0o3U4z7NY0yQbuv8CHu~xV1SjlEjSMCrSuYSfxuhmZZJ7kijJbsnOQG0WSqc-YyN9kjyadkn6bs5lEM23aCpCEF0ayzkt8gnkaQ__&Key-Pair-Id=APKAIE5G5CRDK6RD3PGA)
Kinetics of DNA synthesis by GC and resting B cells. B cells were cultured for 10 days in the presence of CD40 MoAb, G28-5 (•), PMA with ionomycin (▵), or CM alone (○). [3H]thymidine uptake was measured after the intervals shown. (A) GC B cells; (B) GC B cells in the presence of CD32-L cells; (C) resting B cells in the presence of CD32-L cells. Data are mean cpm for cells purified from the same tonsil and representative of five experiments. Values for [3H]thymidine uptake by CD32-L cells alone (∼4,000 to 10,000 cpm) have been subtracted in (B) and (C).
