{"id":34885,"date":"2025-06-23T20:07:39","date_gmt":"2025-06-23T20:07:39","guid":{"rendered":"https:\/\/gaviki.com\/blog\/?p=34885"},"modified":"2025-06-23T20:07:45","modified_gmt":"2025-06-23T20:07:45","slug":"in-humulin-production-the-b-galactosidase-insulin-fusion-proteins-are-purified-by-affinity-chromatography","status":"publish","type":"post","link":"https:\/\/gaviki.com\/blog\/in-humulin-production-the-b-galactosidase-insulin-fusion-proteins-are-purified-by-affinity-chromatography\/","title":{"rendered":"In Humulin production, the b-galactosidase-insulin fusion proteins are purified by affinity chromatography"},"content":{"rendered":"\n<p>In Humulin production, the b-galactosidase-insulin fusion proteins are purified by affinity chromatography. True or false In Humulin production, the b-galactosidase-insulin f a. TRUE b. FALSE<\/p>\n\n\n\n<p><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-cyan-blue-color\">The correct answer and explanation is:<\/mark><\/strong><\/p>\n\n\n\n<p><strong>Correct Answer: a. TRUE<\/strong><\/p>\n\n\n\n<p>In Humulin production, \u03b2-galactosidase-insulin fusion proteins are indeed purified by <strong>affinity chromatography<\/strong>. This method is used during the recombinant DNA technology process where <strong>human insulin is produced using genetically engineered bacteria<\/strong>, typically <em>Escherichia coli<\/em>.<\/p>\n\n\n\n<p>The process begins with the insertion of the human insulin gene into a plasmid, which is then introduced into <em>E. coli<\/em>. To enhance expression and simplify purification, the <strong>insulin gene is fused to a gene coding for \u03b2-galactosidase<\/strong>, a bacterial enzyme. This creates a fusion protein that includes both \u03b2-galactosidase and insulin. The fusion protein is expressed in large quantities in the host bacteria.<\/p>\n\n\n\n<p>This fusion strategy serves two purposes:<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>It increases the stability and solubility of the insulin precursor in bacterial cells.<\/li>\n\n\n\n<li>It simplifies the process of purification because the \u03b2-galactosidase portion of the fusion protein can specifically bind to an affinity matrix.<\/li>\n<\/ol>\n\n\n\n<p><strong>Affinity chromatography<\/strong> is then used to isolate the fusion protein. This technique relies on the specific interaction between \u03b2-galactosidase and a ligand attached to a chromatography resin. When the cell lysate containing the fusion protein is passed through the affinity column, only the \u03b2-galactosidase-insulin fusion protein binds to the column, while other proteins wash away.<\/p>\n\n\n\n<p>After purification, chemical or enzymatic methods are used to cleave the insulin segment from the fusion protein. The insulin chains (A and B chains) are then joined correctly through disulfide bonding to form <strong>bioactive recombinant human insulin<\/strong>, known commercially as Humulin.<\/p>\n\n\n\n<p>This approach was a breakthrough in biotechnology, allowing for safe, large-scale production of human insulin without relying on animal pancreases.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>In Humulin production, the b-galactosidase-insulin fusion proteins are purified by affinity chromatography. True or false In Humulin production, the b-galactosidase-insulin f a. TRUE b. FALSE The correct answer and explanation is: Correct Answer: a. TRUE In Humulin production, \u03b2-galactosidase-insulin fusion proteins are indeed purified by affinity chromatography. This method is used during the recombinant DNA [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-34885","post","type-post","status-publish","format-standard","hentry","category-quiz-questions"],"_links":{"self":[{"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/posts\/34885","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/comments?post=34885"}],"version-history":[{"count":1,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/posts\/34885\/revisions"}],"predecessor-version":[{"id":34889,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/posts\/34885\/revisions\/34889"}],"wp:attachment":[{"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/media?parent=34885"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/categories?post=34885"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/tags?post=34885"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}