k1neHTA MG GSH k2neHTA HTA VfGlxI HTA KmGlxIHTA VrGlxI SLG KmGlxISLG 1 HTA KmGlxIHTA SLG KmGlxISLG GSH KmGlxIGSH VGlxII KmGlxIISLG SLG Lac GSH KeqGlxII 1 SLG KmGlxIISLG Lac KmGlxIILac GSH KmGlxIIGSH HTA KiGlxIIHTA