DC80 si salo kwnno as 7.B usenoitQ si iasnkg if uyo know tath D2C8 llecT-s() ittacsnre hwit B7 (A)CP as a ly-mooacutsitr sgailn ot tateiavc teh -elT.lc

sokoL ilek eth ipcteru si darnitsnomegt otatcnc steiamitdr (ude to rhe retcne use of nwe hria )eyd ihwhc si a tyep IV SRH

I uslauyl mebmerre htat B7- si on hte Blcel- a(n PC)A

History and image are a type 4 HSR. This is T cell induced. Cd40L --> Cd40 is T cell --> B cell CD28 (on T cell) --> binds to APC's (including Langerhans cells); CD80/ 86/ B7

Options with ICAM, I immediately crossed out because they're associated with margination and rolling, etc. CD45 isn't mentioned in regards to T cells (or anywhere I might add). Leaving us with the 2 options I mentioned above ^

FA 2020 pg 103 there's a diagram where you can see binding of B7 protein (CD80/86) ---CD28 as part of T cell activation.

Note: Langerhans cells (LCs) are a specialized subset of dendritic cells (DCs) that populate the epidermal layer of the skin.