Figure 3.—

Preferential association of SYP-1 with the X chromosomes. (A) Images of pachytene region nuclei from control and syp-1 RNAi worms in which the X chromosomes were specifically labeled by S-phase incorporation of fluorescently labeled nucleotides (red) and immunostained to detect X chromosome pairing center binding protein HIM-8 (green) and SYP-1 (white). Bar, 2 μm. (B) Pie chart depicting the fractions of nuclei assayed that contained the indicated numbers of SYP-1 stretches associated with X chromosomes and/or autosomes.