TYRP1 changes the shape with the pigment molecules. The new shape suggests the pigment reflects light in a unique way. This triggers a brown phenotype in place of black.
Black and brown Shih Tzu puppies perfectly Blend https://jasperjovr036702.wikiannouncement.com/7482655/the_smart_trick_of_buy_shih_tzu_puppies_that_nobody_is_discussing