Least-squares regression analysis for the data presented in Fig. 2.

Data represents the relationship between the specific radioactivity of protein-bound phenylalanine and incorporation time as shown in Figs. 2c, d. The regression coefficient (b) characterises the rate of incorporation of the radiolabelled amino acid into the protein bound fraction in dpm nmol phenylalanine min−1. pb (p value) represents the significance of the least-squares regression model, and pa represents the significance of the variation between the intercept (a) and the origin. All vales are means ±SEM.