- The sequence of a 17.5 kb DNA fragment on the left arm of yeast chromosome XI identifies the protein kinase gene ELM1, the DNA primase gene PRI2, a new gene encoding a putative histone and seven new open reading frames. Purnelle, B., Tettelin, H., Van Dyck, L., Skala, J., Goffeau, A. Yeast (1993)