TABLE 4.

Cross-feeding of pyridine by aphA* cells

Strain in lawn	Relevant genotype of lawna	Fed by aphA*
TT13007	nadB pncA	Yes
TT14890	nadA pncA pnuC	No
TT15620	nadA pncA pnuC pnuD*	Yes
TT15621	nadA pncA pnuC pnuD* nadR(R+ T−)	No
TT15622	nadA pncA pnuC pnuD* nadR(R− T+)	Yes
TT15623	nadA pncA pnuC pnuD* nadR(R− T−)	No
TT15870	nadB pncA nadR(R− T+)	Yes
TT15871	nadB pncA nadR(R− T−)	No
TT15872	nadB pncA nadR(R+ T−)	No
TT20191	nadA pncA pnuC pnuD	No
TT15564	nadA pncA pnuC pnuD*	Yes

^aComplete genotypes are shown in Table 1.