TABLE 1.

Amino acid substitutions in K1 protein of Klebsiella oxytoca strain SC 10,436 compared with previously published K1 OXY-2

Strain	β-Lactamase	pI	Amino acid at codon:						Reference(s) (1)
			20	35	130	197	223	255
SL911	OXY-2-1	5.2	Gly	Asp	Ser	Asp	Ala	Asp	1, 6
K1794	OXY-2-2	5.7				Asn			6
D488	OXY-2-3	6.4				Asn	Val		6
11V	OXY-2-4	6.8		Ala		Asn		Asn	6
KER		6.3	Ser		Gly	Asn		Asn	10
SC 10,436		6.5	Ser			Asn		Asn	4; this study