King also worked on a project studying the mutations of genes linked to breast cancer inheritance in Nigerian women between March 1998 and 2014. King's team decided to do this research on the grounds that more people die in Nigeria from triple negative breast cancer that is diagnosed at a later stage than other, more educated regions of the world, such as Europe or America. At the finish of this study, King's team was still unsure of the reason for such high levels of Triple-negative breast cancer, since many of the people diagnosed were not showing mutations in the BRCA1 gene. Her study supported the idea that genomic sequencing could be useful as a tool to help detect gene mutations early and be proactive in letting those who have high risks for breast cancer know ahead of time.