. 2018 Oct 9;308(8):1113–1120. doi: 10.1016/j.ijmm.2018.10.001

Table 3.

Detected ions assigned to sialic acids obtained by treatment of BSM with BTSA-His alone (A), BTSA-His combined with NanS-His (B), and BTSA-His combined with NanS-p1-His (C) and corresponding m/z values.

No.	Sialic acid species	*m/z*
A
1	Neu5Ac [M + Na]⁺	332.10
2	Neu5Gc [M + Na]⁺	348.09
3	Neu5Ac(OAc) [M + Na]⁺	374.11
4	Neu5Gc(OAc) [M + Na]⁺	390.10

B
1	Neu5Ac [M + Na]⁺	332.10
2	Neu5Gc [M + Na]⁺	348.09
3	Neu5Ac [M-H+2Na]⁺	354.08
4	Neu5Gc [M-H+2Na]⁺	370.07

C
1	Neu5Ac [M + Na]⁺	332.10
2	Neu5Gc [M + Na]⁺	348.09
3	Neu5Ac [M-H+2Na]⁺	354.08
4	Neu5Gc [M-H+2Na]⁺	370.07