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Biochemistry

9th Edition
Mary K. Campbell + 2 others
ISBN: 9781305961135

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BuyFindarrow_forward

Biochemistry

9th Edition
Mary K. Campbell + 2 others
ISBN: 9781305961135
Textbook Problem

RECALL List three ways in which the structure of chlorophyll differs from that of heme.

Interpretation Introduction

Interpretation:

The three ways in which the structure of chlorophyll differs from the structure of heme are to be determined.

Concept introduction:

The basic molecular structure of chlorophyll contains a chlorine ring, which contains four nitrogen atoms surrounding the central magnesium atom. In addition to that, it contains several other side chains and a hydrocarbon tail.

The molecular structure of hemoglobin contains four heme groups surrounding a globin group in the tetrahedral fashion. The four iron atoms bind to the oxygen atom forming an oxyhemobglobin molecule.

The major difference between the structures of chlorophyll and heme group is the presence of a cyclopentanone ring fused to the tetrapyrrole ring.

Explanation

The molecular structure of chlorophyll contains a chlorine ring, where four nitrogen atoms surround a central metal atom that is magnesium (Mg), while the structure of heme group contains the globin group surrounded in a tetrahedral manner. The globin group contains four iron (Fe) molecules, which bind with the oxygen to form oxyhemoglobin structure.

The structure of chlorophyll is as follows:

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