Table 8 Tests for stem-pairing of preferred codon N3 in mRNA secondary structure predictions
M-H Χ2a
GroupA3C3G3U3N3
018.83261.80***19.00*295.36112.31
1987.55612.26***164.31***n/a670.40
21810.242.02254.02***944.23***4224.29***
3806.18242.88***358.13***1.693011.43***
42355.78311.50***536.99***6.141.16
Alln/a1945.18***1594.94***n/a3675.23
  • mRNA, messenger RNA. *P < 0.01. ***P < 1e-10.

  • a Mantel-Haenszel Χ2 test with continuity correction and an alternate hypothesis that preferred codons are more likely to be a stem than loop in mRNA secondary structure.