in , ▁by ▁medi ating ▁sul f ation ▁of ▁their ▁car bo h yd rate ▁structures . ▁ ▁Car bo h yd rate ▁sul f otr ans fer ase ▁ 1 0 ▁( CH ST 1 0 ), ▁which ▁trans fers ▁sul f ate ▁to ▁position ▁ 3 ▁of ▁the ▁terminal ▁gl uc ur onic ▁acid ▁in ▁both ▁protein - ▁and ▁li pid - link ed ▁o lig os ac char ides . ▁It ▁direct s ▁the ▁b ios yn thesis ▁of ▁the ▁H N K - 1 ▁car bo h yd rate ▁structure , ▁a ▁sul f ated ▁gl uc ur ony l - la ct os amin yl ▁resid ue ▁carried ▁by ▁many ▁neural ▁recognition ▁mole cules , ▁which ▁is ▁involved ▁in ▁cell ▁interactions ▁during ▁ont ogen etic ▁development ▁and ▁in ▁syn apt ic ▁pl astic ity ▁in ▁the ▁adult . ▁ ▁Car bo h yd rate ▁sul f otr ans fer ases ▁ 1 1 ▁- ▁ 1 3 ▁( CH ST 1 1 , ▁CH ST 1 2 , ▁CH ST 1 3 ), ▁which ▁catal y ze ▁the ▁transfer ▁of ▁sul f ate ▁to ▁position ▁ 4 ▁of ▁the ▁Gal NA c ▁resid ue ▁of ▁ch ond roit in . ▁Ch ond roit in ▁sul f ate ▁constit utes ▁the ▁pre domin ant ▁prote og ly can ▁present ▁in ▁cart il age ▁and ▁is ▁distributed ▁on ▁the ▁surfaces ▁of ▁many ▁cells ▁and ▁ext rac ell ular ▁matrices . ▁Some , ▁thought ▁not ▁all , ▁of ▁these ▁en zym