| protopope | One of the clergy of first rank in the lower order of secular clergy; an archpriest. Synonym: protopapas. Origin: Proto- + pope: cf. F. Protopope, Russ. Protopop'. Source: Websters Dictionary (01 Mar 1998) |
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| protoporphyria | Enhanced faecal excretion of protoporphyrin. (05 Mar 2000) |
| protoporphyrin | <biochemistry> Porphyrin ring structure lacking metal ions. The most abundant is protoporphyrin IX, the immediate precursor of hem. (18 Nov 1997) |
| protoporphyrin type III | 2,7,12,18-Tetramethyl-3,8-divinylporphin-13,17dipropionic acid;the principal protoporphyrin found in nature (one of 15 possible isomers), characterised by the presence of 4 methyl groups, 2 vinyl groups, and 2 propionic acid side chains; a porphyrin derivative that, with iron, forms the haem of haemoglobin and the prosthetic groups of myoglobin, catalase, cytochromes, etc. (05 Mar 2000) |
| protoporphyrinogen type III | The immediate precursor of protoporphyrin III in haem biosynthesis; elevated in cases of variegate porphyria. (05 Mar 2000) |
| protoporphyrinogen type III oxidase | A mitochondrial enzyme that uses O2 to convert protoporphyrinogen type III to protoporphyrin type III in haem biosynthesis; a deficiency of this enzyme is associated with variegate porphyria. (05 Mar 2000) |
| protoporphyrins | Porphyrins with four methyl, two vinyl, and two propionic acid side chains attached to the pyrrole rings. Protoporphyrin ix occurs in haemoglobin, myoglobin, and most of the cytochromes. (12 Dec 1998) |
| protoproteose | See: primary proteose. (05 Mar 2000) |
| protopterus | <zoology> See Komtok. Origin: NL, from Gr. First + a feather (taken to mean, fin). Source: Websters Dictionary (01 Mar 1998) |
| protosalt | <chemistry> A salt derived from a protoxide base. Origin: Proto- + salt. Source: Websters Dictionary (01 Mar 1998) |
| protosilicate | <chemistry> A silicate formed with the lowest proportion of silicic acid, or having but one atom of silicon in the molecule. Origin: Proto- + silicate. Source: Websters Dictionary (01 Mar 1998) |
| protosomite | <zoology> One of the primitive segments, or metameres, of an animal. Origin: Proto- + somite. Source: Websters Dictionary (01 Mar 1998) |
| protospore | The initial product of progressive cleavage, in which a multinucleate spore is produced. Origin: proto-+ G. Sporos, seed (05 Mar 2000) |
| protostoma | During gastrulation cells on the surface of the embryo move into the interior to form the mesoderm and endoderm. The opening formed by this invagination of cells is the blastopore. It is an opening from the archenteron, the primitive gut, to the exterior. In some animals this opening becomes the anus, whilst in others it closes up and the anus opens at the same spot or nearby. In some animals, for example chick, invagination occurs without a true blastopore and the site at which the cells move in (primitive streak) may be termed a virtual blastopore. (18 Nov 1997) |
| protostome | Synonym: blastopore. Origin: proto-+ G. Stoma, mouth (05 Mar 2000) |
Synonyms : Feline Sarcoma Proto-Oncogene Protein, Proto-Oncogene Protein c-fes, Proto-Oncogene Protein fes, c-fes Proto-Oncogene Proteins, c-fes Tyrosine Kinase, Feline Sarcoma Proto Oncogene Protein, Kinase, c-fes Tyrosine, Proteins, c-fes, Proto Oncogene Protein c fes
Synonyms : Antigens, Fos-Related, FRAs, Proto-Oncogene Products c-fos, Proto-Oncogene Proteins fos, p55 c-fos, Fos Related Antigens, Proto Oncogene Products c fos, Proto Oncogene Proteins c fos, Proto Oncogene Proteins fos, c fos Proteins, fos Proto Oncogene Proteins
Synonyms : Fyn Tyrosine Kinase, Protein-Tyrosine Kinase p59(fyn), Proto-Oncogene Protein c-fyn, Proto-Oncogene Protein c-syn, Proto-Oncogene Protein p59(fyn), Proto-Oncogene Protein p72(fyn), c-fyn Proto-Oncogene Proteins, p59 c-fyn Protein, p59(fyn) Protein
Synonyms : Hematopoietic Cell Kinase, Proto-Oncogene Protein hck, Tyrosine-Protein Kinase HCK, c-hck Proto-Oncogene Proteins, Proto Oncogene Protein c hck, Proto Oncogene Protein hck, Proto Oncogene Proteins c hck, Proto-Oncogene Proteins, c-hck, c hck Proteins
Synonyms : Proto-Oncogene Products c-jun, Proto-Oncogene Proteins jun, jun Proto-Oncogene Product p39, p39 c-jun, Proto Oncogene Products c jun, Proto Oncogene Proteins c jun, Proto Oncogene Proteins jun, c fos Associated Protein p39, c jun Proteins, p39 c jun
| protanope |
(pro
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| protective |
(pro
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| proteinaceous |
(pro
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| proteinogenous |
(pro
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| proteolysis |
(pro
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