genome parascaris trackDb parascaris_v1.11/trackDb.txt description Parascaris germline v1 twoBitPath parascaris_v1.11/pu_v1.11.2bit organism Parascaris univalens defaultPos chrX:47181034..47184033 scientificName P. univalens htmlPath parascaris_v1.11/description.html groups parascaris_v1.11/groups.txt