Internet data encoding

BH4 deficiency can be caused by mutations in genes encoding the enzymes involved in its biosynthesis (GTPCH, PTPS, and SR) or regeneration (PCD/DCoH and DHPR). BH4 deficiency due to autosomal recessive mutations in BH4-metabo-lizing enzymes (except SR) has been described as a cause of hyperphenylalaninemia (HPA) [6]. Biochemical, clinical, and DNA data of patients with BH4 deficiencies are tabulated in the BIODEF and BIOMDB databases and are available on the Internet (www.bh4.org) [7]. Depending on the enzyme defect and the mode of inheritance,... 

MIME (multipurpose Internet mail extensions) Extension of electronic mail encoding for exchange of multimedia mail, including support of audio and video data. 

Having a platform-independent encoding for data transport does not yet mean that it is possible to transport the data unchanged via a given Internet channel. If sent, for example, as part of an electronic mail message, only 7-bit characters and short lines up to 80 characters can safely be expected to survive all possible involved transport steps. Hence there is a demand to encode and decode binary or 8-bit information into more robust forms. The most commonly used and unfortunately incompatible schemes for this task are the uuencode, mac-binhex, base64, and quoted-printable encodings for MIME applications, and UTF-8 for UNICODE. ... 

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