\begin{frame}{Основания}
    \setatomsep{1.6em}%
      \footnotesize \begin{tabular}{c c c c}
          \chemfig{*6((-[5,0.5,,,draw=none]\color{blue}2)=N(-[6,0.5,,,draw=none]\color{blue}3)-(-[6,0.5,,,draw=none]\color{blue}4)*6(
            -\chembelow{N}{H}(-[6,1.0,,,draw=none]\color{blue}9)-(-[7,0.5,,,draw=none]\color{blue}8)=N?(-[1,0.5,,,draw=none]\color{blue}7))
        =?(-[2,0.5,,,draw=none]\color{blue}5)-(-[2,0.5,,,draw=none]\color{blue}6)=N(-[3,0.5,,,draw=none]\color{blue}1)-[,,1])} &

            \chemfig{*6((-[:-130]H_2N)=N-*6(-\chembelow{N}{H}-=N?)=?-(=[2]O)-HN-[,,2])}&
            \chemfig{*6(=N-*6(-\chembelow{N}{H}-=N?)=?-(-[2]NH_2)=N-[,,1])}&~\\[1.0cm]-HN-[,,2])}&
            \chemfig{*6(=N-*6(-\chembelow{N}{H}-=N?)=?-(-[2]NH_2)=N-[,,1])}&~\\[1.0cm]
            Пурин&Гуанин&Аденин& \\[.2cm]
             \hline\\[.2cm]
             \chemfig{*6((-[5,0.5,,,draw=none]\color{blue}2)=N(-[6,0.5,,,draw=none]\color{blue}1)-(-[7,0.5,,,draw=none]\color{blue}6)
             =(-[1,0.5,,,draw=none]\color{blue}5)-(-[2,0.5,,,draw=none]\color{blue}4)=N(-[3,0.6,,,draw=none]\color{blue}3)-)} &
            \chemfig{*6((=[5]O)-\chembelow{N}{H}-=-(-[2]NH_2)=N-)} &
            \chemfig{*6((=[5]O)-\chembelow{N}{H}-=-(=[2]O)-HN-[,,2])} &
            \chemfig{*6((=[5]O)-\chembelow{N}{H}-=(-[1])-(=[2]O)-HN-[,,2])} 
              \\[1.0cm]
            Пиримидин&Цитозин&Урацил&Тимин\\[.2cm]
             \hline

        \end{tabular}
        \end{center}
\end{frame}

\begin{frame}{Основания и остов}
        \begin{center}
    \begin{tikzpicture}[help lines/.style={thin,draw=black!50}]
        \node (2) at (6,5) {N-гликозидная связь};
        \node (1) at (2,2) {%
    \schemestart[][west]
    \setatomsep{1.7em}\setcrambond{0.2em}{}{}%
     \small\chemfig{-[0]O-[0]-[6]?<[7](-[,,,,line
        width=0.2em]>[1](-[2]OH)-[:160,1.3]O?)-[6]O
        -[6]P(=[:-90]O)(-[4]\chemabove{O}{\hspace{1em}-})
        -[0]O-[0]-[6]?[c2]<[7](-[,,,,line
        width=0.2em]>[1](-[2]OH)-[:160,1.3]O?[c2])-[6]O-[6]
    }
    \arrow{-U>[ 2B ]}[0] 
    \setatomsep{1.7em}\setcrambond{0.2em}{}{}%
      \small\chemfig{-[0]O-[0]-[6]?<[7](-[,,,,line
        width=0.2em]>[1](-[2]B)-[:160,1.3]O?)-[6]O
        -[6]P(=[:-90]O)(-[4]\chemabove{O}{\hspace{1em}-})
        -[0]O-[0]-[6]?[c2]<[7](-[,,,,line
        width=0.2em]>[1](-[2]B)-[:160,1.3]O?[c2])-[6]O-[6]
    }
\schemestop};
\draw [orange,thick](2.south east) -- (2.south);
\draw [->,orange,thick] (2.south east) -- (6,3.8);
\end{tikzpicture}
        \end{center}
\end{frame}

{Молекулярная динамика}
\begin{center}
    \tiny
$$ U=\sum_{bonds}{ \frac{k_i}{2} ( l_i - l_0)^2} + \sum_{angles}{ \frac{k_i}{2} ( \phi_i - \phi_0)^2} + \sum_{torsions} { \frac{V_n}{2} (1 + cos(n\omega - \gamma))} + $$
$$ + \sum_{i=1}^N \sum_{j=i+1}^N  \left (   4 \epsilon_{ij} \left [ \left ( \frac{\sigma_{ij}}{r_{ij}} \right )^{12} - \left ( \frac{\sigma_{ij}}{r_{ij}} \right )^6  \right ] + 
\frac{q_i q_j}{ 4\pi \epsilon_0 r_{ij}} \right ) $$  
\rule[0.5cm]{\linewidth}{1pt}
\begin{tikzpicture}[node distance=1cm, auto]  
\tikzset{%
    mynode/.style={rectangle,draw=brown, top color=blue!10,bottom color=blue!10 },
    myarrow/.style={->, >=latex', shorten >=1pt, thick},
    mylabel/.style={text width=7em, text centered} 
}  
\node (nGray)   [mynode]   at      (0, 2.5) 
{%
    \begin{minipage}{0.4\textwidth}
        \footnotesize Расчёт силы, действующей на атом  
        \begin{center}
        \normalsize
$ F_i= \sum_j F_{ij} $
       \end{center}
    \end{minipage}
};
\node (nRed)    [mynode]    at      (3, 0)
{%
    \begin{minipage}{0.4\textwidth}
       \footnotesize Расчёт новых координат  
        \normalsize
        \begin{center}
            $ \frac{\partial^2r_i}{\partial t^2}=\frac{F_i}{m_i} $ \\
            $ \frac{\partial r_i}{\partial t} =v_i , \frac{\partial
            v_i}{\partial t} = \frac{F_i}{m_i} $
       \end{center}
    \end{minipage}
};
\node[mylabel, below of=nGray] (label1) at (-1,2) {%
    \begin{minipage}{0.1\textwidth}
           \[ \Delta t \]
    \end{minipage}
   };  
\draw [ color   = red,   ultra thick,  -> ](nGray) |- (nRed);
\draw [ color   = brown, ultra thick,  -> ](nRed) |- (nGray);
\end{tikzpicture} 
\end{center}
\end{frame}%

\begin{frame}%
{Система для моделирования}
\begin{tikzpicture}[xscale=1.0,yscale=1.0]
    \node (ri) at (3,2 ) {\includegraphics[width=0.45\textwidth]{ribo.png}};
    \node (cu) at (9,2) {\includegraphics[width=0.45\textwidth]{ribocube.png}};
    \draw[thick,opacity=0.7] (2,1) rectangle (4,3);
    \draw[thick] (cu.south west) rectangle (cu.north east);
    \draw[dashed] (4,3) -- (cu.north west);
    \draw[dashed] (4,1) -- (cu.south west);
      \begin{scope}[fill opacity=.5,transparency group]
    \node[thick,draw=black, fill=orange,opacity=0.5,circle,minimum size=1cm, radius=1.5] 
    at (cu.center) {~} ;
    \end{scope} 
     \node at (cu.center){Lig};
  \end{tikzpicture}
\end{frame}%

\begin{frame}%
{Конформационное равновесие}
  \begin{center}
    \schemestart 
    \setnodestyle{draw,rectangle,fill=red,minimum size=20pt}
    \chemfig{P_2} 
    \arrow{<->>}
    \setnodestyle{draw,circle,fill=yellow,minimum size=20pt}
    \chemfig{P_1}
    \schemestop
    \hspace{3cm}~\par
    \vspace{.75cm}
\begin{tikzpicture}[xscale=1.0,yscale=1.0]
    %% Pot energy plot
  \begin{axis}[height=7cm,width=15cm,
    xmin=-300,xmax=400,ymin=-.2, hide x axis, hide y axis,
    xlabel=$$, ylabel=$$]
   \addplot+[raw gnuplot, draw=blue, mark=none, smooth,thick] gnuplot[id=m]{%
         set xrange [-180:180]; plot 1-0.25*(1+cos(3*pi*x/180))- 0.25*(1+cos(2*pi*x/180)) };
  \draw[dashed,thick,red,->] (axis cs:-150,.7) parabola bend (axis cs:-70,0.95)(axis cs:0,.7);
  \addplot[->,thick] coordinates {(-180,0.33) (-150,0.33)};
  \addplot[->,thick] coordinates {(-180,0.90) (-80,.90)};
  \addplot[thick] coordinates {(-180,0.90) (-180,.70)};
  \addplot[thick] coordinates {(-180,0.33) (-180,.52)};
  \addplot[->,thick] coordinates {(90,0.33) (-120,0.33)};
  \addplot[->,thick] coordinates {(90,0.00) (5,.00)};
  \addplot[thick] coordinates {(90,0.33) (90,0.22)};
  \addplot[thick] coordinates {(90,0) (90,.05)};
  \node at (axis cs:-180,0.6) {$\Delta E_a$};
  \node at (axis cs:90,0.16) {$\Delta G$};
  \node at (axis cs:-140,0.25) {$P_2$};
  \node at (axis cs:0,-0.1) {$P_1$};
  \node at (axis cs:200,0.1){%
  \Large{$\frac{[P_1]}{[P_2]}\sim e^{-\frac{\Delta G}{RT}}
      $}
   } ;
  \node at (axis cs:200,-0.1){%
  $\frac{1}{100}\sim $ \textit{5 кКал}} ;
  \node at  (axis cs:-180,0){%
  \Large{$ k_v \sim e^{-\frac{\Delta E_a}{RT}}$}
  };
\end{axis}
\end{tikzpicture}
  \end{center}
\end{frame}%