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. 2009 Aug 28;5(8):e1000483. doi: 10.1371/journal.pcbi.1000483

Table 1. State types of the singlet transducer (single-sequence SCFG) of the TKF Structure Tree model.

State type absorb Inline graphic description
Inline graphic Inline graphic Start of a loop
Inline graphic Inline graphic Inline graphic Single-base emission
Inline graphic Inline graphic Start of a stem
Inline graphic Inline graphic Inline graphic Base-pair emission
Inline graphic Inline graphic Inline graphic Bifurcation

Singlet transducers can only have states of type Inline graphic or Inline graphic.