Table V.

Relative proportions of the three species of13C-enriched Ser in leucovorin rescue experiments

Treatment[α,β-13C]Ser[β-13C]Ser[α-13C]Ser
%
Control68.5  ± 610.5  ± 221  ± 3
Methotrexate + leucovorin42  ± 418  ± 340  ± 5

The treatments are the same as those described in Table IV. The data are expressed as the percentage of total 13C-enriched Ser. There are no data for the methotrexate-only treatment (Table IV).