sentences:  It does this by binding to the 40S subunit of the ribosome.This can thus be used in the study of protein degradation in cells.Mutants resistant to emetine are altered in the 40S ribosomal subunit (S14 protein), and they exhibit cross-resistance to cryptopleurine, tylocrebrine, cephaeline and tubulosine, but not other inhibitors of protein synthesis.