. Author manuscript; available in PMC: 2011 Feb 23.

Published in final edited form as: Biochemistry. 2010 Feb 23;49(7):1469. doi: 10.1021/bi9020132

Table 2.

NMR Chemical shifts of histidine imidazole side-chain resonances in AtraPBP1.

Residue #	¹H_δ2 (ppm)	¹H_ε1 (ppm)	¹⁵N_δ1 (ppm)	¹⁵N_ε2 (ppm)	Tautomer
pH 4.5
H69	7.22	8.58	176	173	cationic
H70	7.34	8.54	176	174	cationic
H80	6.51	8.48	176	176	cationic
H95	7.18	8.60	175	175	cationic
H123	7.29	8.57	178	172	cationic
pH 7.0
H69	7.24	8.44	181	174	cationic
H70	7.27	7.95	180	173	cationic
H80	6.93	7.57	249	165	ε-NH
H95	6.98	7.11	236	170	ε-NH
H123	7.04	8.18	195	178	ε-NH

ε-NH represents epsilon-N-H tautomer.