PURINES+

<body topmargin=0 leftmargin=0 marginheight=0 marginwidth=0> <table cellpadding=0 cellspacing=0 border=0><tr> <td valign="top" colspan=2 height=28 BGCOLOR="#006699" TEXT="#080000"> <div> <FONT SIZE="2" COLOR="#FFFBF0" FACE="Arial" ><B>CHEMISTRY SCHOOL</B><B>  </B><B> </B></FONT><A HREF="index.htm" TARGET="_top" TITLE="CHEMISTRY SCHOOL"><U>HOME PAGE - INDEX TO LESSONS</U></A>       PAGE 10  <A NAME="purines_"><IMG BORDER="0" SRC="1x1.gif" HEIGHT="1" ALIGN="bottom" WIDTH="1" HSPACE="0" VSPACE="0" ></A>HOW TO REMEMBER THE PURINES & PYRIMIDINES</div> <bR> <div> </div> </td> </tr><tr> <td valign="top" width=212 BGCOLOR="#66CCCC" TEXT="#080000"> <div> <A HREF="our_nucleic_acids_.htm" TARGET="_top" TITLE="OUR NUCLEIC ACIDS"><U>" OUR NUCLEIC ACIDS "</U></A></div> <bR> <div> TABLE OF CONTENTS</div> <div> <A HREF="guanine.htm" TARGET="_top" TITLE="GUANINE"><U>PAGE 1             </U></A><A HREF="guanine.htm" TARGET="_top" TITLE="GUANINE"><U><B>G U A N I N E</B></U></A></div> <div> <A HREF="human_adenine.htm" TARGET="_top" TITLE="ADENINE"><U>PAGE 2            </U></A><A HREF="human_adenine.htm" TARGET="_top" TITLE="ADENINE"><U><B> A D E N I N E</B></U></A></div> <div> <A HREF="human_cytosine.htm" TARGET="_top" TITLE="CYTOSINE"><U>PAGE 3           </U></A><A HREF="human_cytosine.htm" TARGET="_top" TITLE="CYTOSINE"><U><B>C Y T O S I N E</B></U></A></div> <div> <A HREF="different_thymines.htm" TARGET="_top" TITLE="THYMINE"><U>PAGE 4            </U></A><A HREF="different_thymines.htm" TARGET="_top" TITLE="THYMINE"><U><B>T H Y M I N E</B></U></A></div> <div> <A HREF="different_uracils.htm" TARGET="_top" TITLE="URACIL"><U>PAGE 5             </U></A><A HREF="different_uracils.htm" TARGET="_top" TITLE="URACIL"><U> </U></A><A HREF="different_uracils.htm" TARGET="_top" TITLE="URACIL"><U><B>U R A C I L</B></U></A></div> <div> <A HREF="chromatin_chromatids_chromosomes_nucleic_acids.htm" TARGET="_top" TITLE="NUCLEIC ACIDS and GENES"><U>PAGE 6      NUCLEIC ACIDS</U></A></div> <div> <A HREF="the_dna_threads.htm" TARGET="_top" TITLE="THE DNA THREADS"><U>PAGE 7   THE DNA THREADS</U></A></div> <div> <A HREF="dna_rna_comparison.htm" TARGET="_top" TITLE="DNA RNA"><U>PAGE 8            DNA ~ RNA</U></A></div> <div> <A HREF="natural_shapes.htm" TARGET="_top" TITLE="NATURAL SHAPES"><U>PAGE 9    NATURAL SHAPES</U></A></div> <div> <A HREF="purines_and_pyrimidines_t.htm#purines_" TARGET="TRLX_Top" TITLE="PURINES"><U>PAGE 10         PURINES +</U></A></div> <div> <A HREF="genome_research.htm" TARGET="_top" TITLE="GENOME RESEARCH"><U>PAGE 11       RESEARCH</U></A></div> <div> <A HREF="recombinant_dna.htm" TARGET="_top" TITLE="RECOMBINANT DNA"><U>PAGE 12  RECOMBINANT DNA</U></A></div> </td> <td valign="top" height=452 BGCOLOR="#FFFFFF" TEXT="#080000"> <bR> <div> <TABLE BORDER="0" CELLPADDING="2" CELLSPACING="1" WIDTH="529" BORDERCOLORLIGHT="#C0C0C0" BORDERCOLORDARK="#808080" FRAME="BOX" RULES="ALL" ALIGN="BOTTOM" HSPACE="0" VSPACE="0" > <tR> <tD VALIGN=TOP HEIGHT= 380 ><NOBR><div> <IMG SRC="1baff8770.gif" border=0 width="504" height="375" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"></div> </NOBR></tD> </tR> </TABLE></div> <bR> <bR> </td> </tr></table></body>