Removal of Melanin from DNA/RNA

[Selvam-Akumulla Philomina]

Respected Sir

I am Mrs.Selvam working in Dermatology Skin Cancer Research.
Our major projects are Melanoma and Lymphoma. I want to try
GITC to remove melanin from biopsie, later extract DNA for 
HLA Typing.

Can you help me right recepie of GITC, I have the following
recepie for GITC: 5.0M Guanidine Isothiocyanate
                         8% Mercap-toethanol
                         10mM EDTA
                         50mM Tris
                         pH 7.5
weather it is right one or not.  attachment of protokol.

Thanks in advance

With Regards
Philomina Selvam