Perforin is a protein that is released by in order to plasma cells; kill target cells cytotoxic t cells; kill target cells b memory cells; switch from igm to igg b cells; bind to epitopes t- cells; stimulate b cells

Perforin is a protein that is released by Cytotoxic t cells to kill target cells. Perforin protein creates transmembranes tubules that would disintegrate target cells.This is also one of the main cytolytic protein that would induce meditated bursting of T cell and natural killer cell.

Well, both latitude and intensity of light affect temperature because, the higher the light intensity, the higher the temperature and since latitude is the measure of how close you are to the equator, then the closer to the equator you are, the higher the temperature is.