ELP6 and microcephaly: In contrast to the Elp2 mutant mice (Kojic et al, 2021) and similar to previously reported Elp6 mutants (Elp6L126Q; wobbly mice) (Kojic et al, 2018), neither global developmental delay nor microcephaly was observed in Elp6L118W animals based on body size and brain weight measurements (Figs 5A and EV3A and B).