label: a 1D-myo-inositol-1-phospho-N-[(R)-2-hydroxy-very-long-chain fatty acyl]-(R)-4-hydroxysphingoid base + UDP-alpha-D-glucuronate => an alpha-D-glucuronosyl-(1<->6)-1D-myo-inositol-1-phospho-N-[(R)-2-hydroxy-very-long-chain fatty acyl]-(R)-4-hydroxysphingoid base + UDP + H(+)
label_lc: a 1d-myo-inositol-1-phospho-n-[(r)-2-hydroxy-very-long-chain fatty acyl]-(r)-4-hydroxysphingoid base + udp-alpha-d-glucuronate => an alpha-d-glucuronosyl-(1<->6)-1d-myo-inositol-1-phospho-n-[(r)-2-hydroxy-very-long-chain fatty acyl]-(r)-4-hydroxysphingoid base + udp + h(+)