▁track ▁and ▁field ▁Category : Long - distance ▁running ▁distances ▁Category : Sum mer ▁Olympic ▁discipl ines ▁in ▁athlet ics <0x0A> </s> ▁Un character ized ▁m eth yl trans fer ase ▁W B SC R 2 2 ▁is ▁an ▁en zym e ▁that ▁in ▁humans ▁is ▁encoded ▁by ▁the ▁W B SC R 2 2 ▁gene . ▁ ▁This ▁gene ▁enc odes ▁a ▁protein ▁containing ▁a ▁nuclear ▁local ization ▁signal ▁and ▁an ▁S - aden os yl - L - m eth ion ine ▁binding ▁mot if ▁typical ▁of ▁m eth yl trans fer ases , ▁suggesting ▁that ▁the ▁encoded ▁protein ▁may ▁act ▁on ▁DNA ▁m eth yl ation . ▁This ▁gene ▁is ▁deleted ▁in ▁Williams ▁synd rome , ▁a ▁mult is ystem ▁development al ▁dis order ▁caused ▁by ▁the ▁delet ion ▁of ▁cont igu ous ▁gen es ▁at ▁ 7 q 1 1 . 2 3 . ▁ ▁References ▁ ▁Further ▁reading <0x0A> </s> ▁The ▁western ▁emer ald ▁( Ch lor ost il bon ▁mel an or h yn chus ) ▁is ▁a ▁species ▁of ▁hum ming bird ▁in ▁the ▁family ▁Tro ch il idae . ▁Alternatively , ▁it ▁has ▁been ▁considered ▁as ▁a ▁sub species ▁of ▁either ▁the ▁blue - ta iled ▁emer ald , ▁C . ▁m ell is ug us , ▁or ▁the ▁red - bil led ▁emer ald , ▁C . ▁g ib son i . ▁It ▁is ▁found ▁in ▁Colombia ▁and ▁E cuador . ▁ ▁Its ▁natural ▁habit ats ▁are ▁subt rop ical ▁or ▁tropical ▁mo ist