Don't know if the whole genes have been sequenced since, but enough had by 1999 to identify the disabling mutation.
From:
Plagiarized Errors and Molecular Genetics (Another argument in the evolution-creation controversy) by Edward E. Max
http://www.talkorigins.org/faqs/molgen/
For the example of the GLO unitary pseudogene of humans, it is known that vitamin C is required in the diet of other primates, (though not for other mammals except guinea pigs). The theory of evolution would make the strong prediction that primates should also be found to have GLO pseudogenes and that these would carry similar crippling mutations to the ones found in the human pseudogene. This prediction was stated in earlier versions of the present essay. A test of this prediction has recently been reported. A small section of the GLO pseudogene sequence was recently compared from human, chimpanzee, macaque and orangutan; all four pseudogenes were found to share a common crippling single nucleotide deletion that would cause the remainder of the protein to be translated in the wrong triplet reading frame (Ohta and Nishikimi BBA 1472:408, 1999).