Table 1 The probabilities (relative frequencies) for the production rules of the SCFG ${Ĝ}_{\mathsf{\text{sto}}}$ obtained by training it using our biological database

S'

${\widehat{p}}_1:=1$

E

${\widehat{p}}_2:=\frac{137}{6476},{\widehat{p}}_3:=\frac{6339}{6476},$

S

${\widehat{p}}_4:=\frac{177}{12952},{\widehat{p}}_5:=\frac{12775}{12952},$

T

${\widehat{p}}_6:=\frac{11086}{12775},{\widehat{p}}_7:=\frac{1689}{12775},$

C

${\widehat{p}}_8:=\frac{14367}{148978},{\widehat{p}}_9:=\frac{134611}{148978},$

A

${\widehat{p}}_{10}:=1,$

L

$\begin{array}{cccc}\hfill {\widehat{p}}_{11}:=\frac{605069}{792975},\hfill & \hfill {\widehat{p}}_{12}:=\frac{31912}{792975},\hfill & \hfill {\widehat{p}}_{13}:=\frac{4912}{264325},\hfill & \hfill {\widehat{p}}_{14}:=\frac{5821}{158595},\hfill \end{array}$

$\begin{array}{ccc}\hfill {\widehat{p}}_{15}:=\frac{1893}{264325},\hfill & \hfill {\widehat{p}}_{16}:=\frac{2723}{31719},\hfill & \hfill {\widehat{p}}_{17}:=\frac{38399}{792975},\hfill \end{array}$

G

${\widehat{p}}_{18}:=\frac{11667}{38399},{\widehat{p}}_{19}:=\frac{7235}{38399},{\widehat{p}}_{20}:=\frac{11831}{38399},{\widehat{p}}_{21}:=\frac{7666}{38399},$

D

${\widehat{p}}_{22}:=1,$

B

${\widehat{p}}_{23}:=\frac{4967}{12748},{\widehat{p}}_{24}:=\frac{7781}{12748},$

F

${\widehat{p}}_{25}:=\frac{3912}{68075},{\widehat{p}}_{26}:=\frac{23208}{68075},{\widehat{p}}_{27}:=\frac{8191}{13615},$

H

${\widehat{p}}_{28}:=\frac{8191}{40700},{\widehat{p}}_{29}:=\frac{32509}{40700},$

P

${\widehat{p}}_{30}:=\frac{533}{4912},{\widehat{p}}_{31}:=\frac{1053}{4912},{\widehat{p}}_{32}:=\frac{2963}{14736},{\widehat{p}}_{33}:=\frac{7015}{14736},$

Q

${\widehat{p}}_{34}:=\frac{4986}{29105},{\widehat{p}}_{35}:=\frac{24119}{29105},$

R

${\widehat{p}}_{36}:=\frac{2357}{5679},{\widehat{p}}_{37}:=\frac{3322}{5679},$

V

${\widehat{p}}_{38}:=1,$

W

${\widehat{p}}_{39}:=1,$

O

${\widehat{p}}_{40}:=1,$

J

${\widehat{p}}_{41}:=\frac{27441}{84620},{\widehat{p}}_{42}:=\frac{57179}{84620},$

K

${\widehat{p}}_{43}:=\frac{15731}{53725},{\widehat{p}}_{44}:=\frac{37994}{53725},$

M

${\widehat{p}}_{45}:=1,$

X

${\widehat{p}}_{46}:=\frac{6196}{87035},{\widehat{p}}_{47}:=\frac{80839}{87035},$

Y

${\widehat{p}}_{48}:=1,$

Z

${\widehat{p}}_{49}:=\frac{2812}{55123},{\widehat{p}}_{50}:=\frac{52311}{55123},$

N

${\widehat{p}}_{51}:=\frac{7737}{17437},{\widehat{p}}_{52}:=\frac{9700}{17437},$

U

${\widehat{p}}_{53}:=\frac{109939}{518817},{\widehat{p}}_{54}:=\frac{408878}{518817},$