TABLE 4.

Amino acid compositions of catalases from D. gigas and other organisms

Amino acid	No. of residues/subunit in catalase from:
	D. gigasa	D. vulgarisb	Bacteroides fragilisc	Helicobacter pylorid
Lys	12	22	27	46
His	16	21	15	20
Arg	35	36	33	27
Asp	22	57	64	61
Thr	40	25	21	26
Ser	29	19	19	26
Glu	14	43	59	48
Pro	50	31	29	30
Gly	49	35	34	32
Ala	88	46	38	31
Cysteic acid	5	3	3	2
Val	34	28	21	33
Met	18	14	14	14
Ile	11	15	22	18
Leu	40	30	32	25
Tyr	18	17	19	25
Phe	18	26	28	31
Trp	9	9	8	11

^aData from this work. 

^bData from GenBank (accession no. AB0203411). 

^cData from SwissProt (accession no. P45737). 

^dData from SwissProt (accession no. P77872).