\exstep{Select the last three sequences in the MAFFT alignment (you may need the scroll down the alignment), and de-align them
with {\sl Edit $\Rightarrow$ Remove All Gaps}. Press [ESC] to deselect these
sequences. Then submit this view for re-alignment with {\sl ClustalO}.}
-\exstep{Return to the MAFFT alignment window in section (c), use [CTRL]-Z (undo) to
+\exstep{Return to the MAFFT alignment window in step (c), use [CTRL]-Z (undo) to
recover the alignment of the last three sequences in this MAFFT alignment.
Once the ClustalO re-alignment has completed, compare the results of
re-alignment of the three sequences with their alignment in the original MAFFT result.}