Duba wurin da ke ƙasa sannan ka amsa tambayar daga baya a cikin harshe ɗaya kamar yadda wurin yake:  Passage: Kwayoyin T masu taimakawa suna bayyana masu karɓar kwayar T (TCR) waɗanda ke gane antigen da ke ɗaure ga ƙwayoyin MHC Class II. MHC: antigen hadaddun kuma an gane shi ta hanyar CD4 co-receptor na mai taimakawa, wanda ke daukar kwayoyin a cikin kwayar T (misali, Lck) wanda ke da alhakin kunna kwayar T. Kwayoyin T masu taimako suna da raunin haɗuwa tare da MHC: antigen hadaddun fiye da yadda aka lura don ƙwayoyin T masu kashewa, ma'ana masu karɓa da yawa (kimanin 200<unk>300) akan kwayar T mai taimako dole ne su ɗaure ta MHC: antigen don kunna kwayar mai taimako, yayin da ƙwayoyin T masu kashewa za a iya kunna su ta hanyar haɗin kwayar MHC: antigen guda ɗaya. Hakanan kunna kwayar T mai taimako yana buƙatar tsawon lokacin haɗuwa da kwayar da ke gabatar da antigen. Haɓaka wani mai taimakawa T cell yana sa shi ya saki cytokines wanda ke shafar aikin nau'ikan sel da yawa. Alamar cytokine da aka samar da sel T masu taimako suna haɓaka aikin microbicidal na macrophages da aikin kwayoyin T masu kashewa. Bugu da kari, kunna kwayar T mai taimako yana haifar da haɓakar kwayoyin da aka bayyana a farfajiyar kwayar T, kamar su ligand CD40 (wanda ake kira CD154), wanda ke ba da ƙarin sigina masu motsawa wanda aka saba buƙata don kunna ƙwayoyin B masu samar da ƙwayoyin cuta.  Tambaya: TCR ta gane antigen da ke da alaƙa da wane irin kwayoyin?
Kwayoyin MHC na aji na II