Phaeodactylum tricornutum photorespiration takes part in glycerol metabolism and is important for nitrogen-limited response

Table 3 Positional labeling of Ser and Gly

	U- ¹³ C, N plus	U- ¹³ C, N minus	1,3- ¹³ C, N plus	1,3-13C, N minus
Ser1	0.175 ± 0.016	0.332 ± 0.006	0.137 ± 0.012	0.080 ± 0.010
Ser2	0.182 ± 0.010	0.313 ± 0.033	0.261 ± 0.005	0.341 ± 0.010
Ser3	0.175 ± 0.017	0.293 ± 0.010	0.276 ± 0.011	0.351 ± 0.001
Gly1	0.167 ± 0.011	0.295 ± 0.025	0.126 ± 0.010	0.076 ± 0.003
Gly2	0.169 ± 0.014	0.292 ± 0.025	0.254 ± 0.006	0.362 ± 0.004
Average FLs of AA	0.150 ± 0.008	0.121 ± 0.005	0.157 ± 0.014	0.141 ± 0.007
Substance FLs	0.3	0.3	0.33	0.33

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