4S3H:
reference: Dimerization mediated by a divergent FHA domain is essential for the DNA damage and spindle functions of fission yeast Mdb1., Luo S, Xin X, Du LL, Ye K, Wei Y, J Biol Chem. 2015 Jul 9. pii: jbc.M115.642538. PMID: 26160178

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