TABLE 3.

Ratio of intracellular to extracellular AA concentrations in uninfected McCoy cells incubated in plasma medium

AA(s)	Intracellular/extracellular AA concn ratio in mock-infected cellsa	Rat heart/plasma AA concn ratiob
Arg	3.7	0.82
Cys	0.85	0.9
Gln	35	9.3
His	11	4.4
Ile	10	1.3
Leu	8.2	1.2
Lys	2.7	1.4
Met	45	2.5
Phe	10	17
Thr	21
Trp	0.75
Tyr	10	1.7
Val	6.6	0.88
Ala	28	6.1
Asn + Glu	67	48c
Asp	378	210
Gly	32	4.5
Pro	26	17
Ser	25	6.9

^aMonolayers were incubated in plasma medium for 4 h before mock infection. Medium was replenished every 6 h, and duplicate AA analyses of both medium and cells were performed at 20 h p.i., enabling calculation of the ratio of the intracellular to the extracellular concentration. 

^bThe rat heart tissue/plasma ratios are shown for comparison (4). 

^cGlu only.