Reference: Bautista-Santos A and Zinker SR (2014) The P1/P2 Protein Heterodimers Assemble to the Ribosomal Stalk at the Moment When the Ribosome Is Committed to Translation but Not to the Native 60S Ribosomal Subunit in Saccharomyces cerevisiae. Biochemistry 53(25):4105-12