Table 7
Total amino acids of seasonal Opuntia humifusa cladodes (unit: mg%)

	Spring	Summer	Winter
Aspartic acid	726.84±7.14^1)a2)	433.08±8.53^b	724.79±0.64^a
Threonine	277.54±4.48^a	175.80±0.86^c	243.70±0.11^b
Serine	274.22±2.99^b	180.05±2.29^c	295.49±0.62^a
Glutamic acid	1,054.23±6.99^a	543.74±26.02^c	803.59±0.61^b
Proline	406.90±14.68^a	164.20±5.67^b	410.57±1.69^a
Glycine	288.96±2.72^a	198.78±5.32^c	263.78±0.26^b
Alanine	326.87±0.56^a	338.02±8.79^a	285.87±0.11^b
Valine	249.49±3.03^a	157.93±3.43^b	251.65±0.20^a
Methionine	60.60±0.72^a	39.34±1.37^b	54.97±5.57^a
Isoleucine	211.87±9.01^a	141.69±1.64^c	179.05±0.42^b
Leucine	443.57±6.64^a	297.56±1.34^c	380.64±1.06^b
Tyrosine	170.68±3.56^a	103.55±5.29^b	100.08±2.25^b
Phenylalanine	238.73±12.04^a	134.70±6.50^b	222.81±4.59^a
Lysine	391.19±6.67^a	278.38±2.74^b	402.74±11.55^a
Histidine	105.81±1.02^b	49.68±1.05^c	115.39±0.38^a
Arginine	236.38±3.91^a	149.86±1.53^c	213.89±0.89^b
TAA³⁾	5,463.86	3,386.36	4,949.00
EAA⁴⁾	1,978.79	1,275.08	1,850.94
EAA/TAA(%)	36.22	37.65	37.40

All results are expressed as mean±SD for three replicates.
Different superscripts in the same row are significantly different at p<0.05 by Duncan’s multiple range test.
Total amino acid.
Total essential amino acid.