an in ▁is ▁also ▁found ▁in ▁parts ▁of ▁the ▁brain ▁and ▁ad ren al ▁g land . ▁ ▁Mel an ins ▁are ▁produced ▁in ▁organ elles ▁called ▁mel anos om es . ▁The ▁production ▁of ▁mel an ins ▁is ▁called ▁mel an ogen esis . ▁Mel anos om es ▁are ▁found ▁in ▁special ized ▁p ig ment ▁cells ▁called ▁mel an ocy tes , ▁but ▁may ▁also ▁be ▁eng ulf ed ▁by ▁other ▁cells , ▁which ▁are ▁then ▁called ▁mel an oph ages . ▁H air ▁acqu ires ▁p ig ment ▁from ▁mel an ocy tes ▁in ▁the ▁root ▁bul b , ▁which ▁depos it ▁mel anos om es ▁into ▁the ▁growing ▁hair ▁structure . ▁A ▁critical ▁step ▁in ▁the ▁production ▁of ▁mel an ins ▁is ▁the ▁catal ysis ▁of ▁ty ros ine ▁by ▁an ▁en zym e ▁called ▁ty ros in ase , ▁producing ▁do pa quin one . ▁D op aqu in one ▁may ▁become ▁e um el an in , ▁or ▁ph ae om el an in . ▁E um el an in , ▁meaning ▁true ▁black , ▁is ▁a ▁dense ▁comp ound ▁that ▁absor bs ▁most ▁w avel ength s ▁of ▁light , ▁and ▁appears ▁black ▁or ▁brown ▁as ▁a ▁result . ▁Ph ae om el an in , ▁meaning ▁r uf ous - black , ▁is ▁character ized ▁by ▁the ▁presence ▁of ▁sul fur - cont aining ▁c yst e ine , ▁and ▁it ▁appears ▁re dd ish ▁to ▁yellow ish ▁as ▁a ▁result . ▁Mel anos om