I have an aqueous solution of tyrosinase but I require the solid form of tyrosinase.   How would you process the aqueous solution to obtain the solid form?

Which of the following best describes the molecule below? . CHOH H H CH OH H OH OH CH OH OH H. OH B -D-galactopyranosyl-(104)-D-glucopyranose a -D-glucopyranosyl-(102)-D-fructofuranoside a -D-glucopyranosyl-(102)-D-glucofuranoside B -D-galactopyranosyl-(104)-D-fructopyranose

The anomer of a-D-glucopyranose is CH:OH он ÓH CH2OH он он он он CH,OH он он он он CH,OH он OH он ÓH ÇH;OH он он он он

A toxin is glycopeptide, X that is composed of an octapeptide and a saccharide Y. Glycopeptide X is composed of a glycan Y and an octapeptide. The octapeptide was cleaved by trypsin, giving 2 tetrapeptides of exactly the same composition except for its N-terminals. When the octapeptide was cleaved by chymotrypsin, it gave a pentapeptide and a tripeptide. DNFB treatment gave DNP-ser. The composition of the octapeptide is lys, ser, trp.and leu. The leu:ser ratio is 4:1. 1. What is the sequence of this octapeptide? Saccharide Y is a tetrasaccharide. To determine its linkages, a person methylated glycopeptide X effectively methylating saccharide Y. Cleavage gave the peptide and the following products: 2,3,4-tri-O-methyl-a-D-glucopyranoside acid, 2,3-di-O-methyl-ß-D- glucopyranoside, 1,3,4-tri-O- methyl-ß-D-glucuronic acid treatments to the isolated tetrasaccharide gave the following results: and 1,4,6-tri-O-methyl-ß-D-N- acetylgalactosamine. Further 1. A. Treatment of saccharide Y with an…

Which of the structures below is that of О-а-D-glucopyranosy-(1->1)- а-D-glucoругanoside CH2OH CH2OH O. H H. он H. он H OH ÓH CH2OH HOH2 H. CH2OH CH2OH O. H H. он он H OH он CH2OH H. о, он он H он он

the following peptide is incubated as chymotrypsin: Gly-Val-Phe-Lys-Ala. Present the detailed chemical mechanism by which chymotrypsin hydrolyzes this peptide. Briefly explain each step. Include only the structure of the final products of the reaction.

Why is a strong reducing agent, such as NaBH4, not suitable for use in the conjugation of an oligosaccharide to a protein?

A) Can you please tell me which of these A.A have a negative side chain? Names of choices in picture provided. B) Can you please tell me which A.A have a hydrophobic side chain and why?  Names and choices in picture provided. Thank You so much!!

Draw the structural formula for α-D-glucosyl-(1→6)-D-mannosamine,and circle the part of this structure that makes the compound a reducing sugar.

How does dithiothreitol (DTT) differ from B-mercaptoethanol (BME) as a reducing agent?