The M_r‐value of chloroplast coupling factor 1

Abstract

The M r of spinach chloroplast coupling factor 1 has been determined by sedimentation equilibrium and by light scattering to be 400 000 ± 24 600 and 407 000 ± 20 000, respectively. These values differ substantially from that obtained previously (325 000) and are consistent with an α 3 β 3 γδϵ subunit stoichiometry.