TABLE 2.

Key enzyme activities in cells grown on MMA or methanol

AssayActivity (nmol min−1 mg protein−1) in cells grown ona:
MMAMethanol plus ammonium
GMAS31.1 ± 0.411.9 ± 0.9
NMGDH
    DCPIP4.4 ± 0.6ND
    Formaldehyde16.0 ± 0.7ND
GMA dissimilation activity
    Formaldehyde4.74 ± 0.12ND
    Ammonium7.98 ± 0.49ND
  • a Values are means ± standard deviations from three assays. ND, not detectable.