The three other point mutations (R 336L, S79 A and S79 A/S87 G) and the loop deletion (Δ 337-341; Ser-Gly-Glu-Ala-Phe) were found to cause lower stablility than that of wild type.
Hin stökkbrigðin þrjú (R 336L, S79 A og S79 A/S87 G) ásamt lykkjuúrfellingunni (Δ 337-341; Ser-Gly-Glu-Ala-Phe) reyndust óstöðugari.