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Fig. 1. Mad1 constructs. (A) Full length Homo sapiens Mad1 protein showing
Mad1-Mad1 oligomerization domain, Mad2-binding domains, and RLK sequence
essential for Bub1 and Bub3 interactions. (B) GST-Mad1F10, which lacks the
first 320 amino acids of full length Mad1, but contains the Mad1-Mad1
oligomerization domain and the Mad2-binding domain. Notably, GST-Mad1F10 is
also missing the last 162 amino acids, which includes the RLK Bub1 and
Bub3-interaction sequence.