Linweaver

To master Lineweaver-Burk plots in 2026, you must know how to transform raw enzyme kinetics data into a linearized format to calculate vital biochemical constants. A Lineweaver-Burk plot (or double-reciprocal plot) takes the hyperbolic Michaelis-Menten equation and turns it into a straight line (y = mx + b). This makes it incredibly easy to identify enzyme maximum velocity ( Vmaxcap V sub m a x end-sub ), substrate affinity ( Kmcap K sub m ), and types of enzyme inhibition.

Below is your step-by-step tutorial to master this process using modern data tools like Excel or Google Sheets. Step 1: Invert Your Raw Data

You cannot plot a Lineweaver-Burk line directly from standard substrate concentration

and initial velocity (V₀) data. You must calculate their reciprocals. Create two new data columns next to your raw data: and 1/V₀.

If your substrate concentration is 2 mM, your new X-value is ⁄₂ = 0.5.

If your velocity is 10 μmol/min, your new Y-value is ⁄₁₀ = 0.1. Step 2: Generate the Scatter Plot and Trendline

Plotting your inverted data points reveals the linear relationship of the enzyme’s behavior. Highlight your new column (X-axis) and 1/V₀ column (Y-axis). Insert a Scatter Plot in your spreadsheet program.

Right-click a data point, select Add Trendline, choose Linear, and check Display Equation on Chart. Step 3: Decode the Linear Equation

Your spreadsheet will display an equation in the form of y = mx + b. Match the components to the Lineweaver-Burk formula:

1V0=(KmVmax)1[S]+1Vmaxthe fraction with numerator 1 and denominator cap V sub 0 end-fraction equals open paren the fraction with numerator cap K sub m and denominator cap V sub m a x end-sub end-fraction close paren the fraction with numerator 1 and denominator open bracket cap S close bracket end-fraction plus the fraction with numerator 1 and denominator cap V sub m a x end-sub end-fraction y represents

1V0the fraction with numerator 1 and denominator cap V sub 0 end-fraction x represents

1[S]the fraction with numerator 1 and denominator open bracket cap S close bracket end-fraction Slope (m) represents

KmVmaxthe fraction with numerator cap K sub m and denominator cap V sub m a x end-sub end-fraction Y-intercept (b) represents

1Vmaxthe fraction with numerator 1 and denominator cap V sub m a x end-sub end-fraction Step 4: Calculate Vmaxcap V sub m a x end-sub Kmcap K sub m

Extract the actual values of your kinetic constants using basic algebra. Find Vmaxcap V sub m a x end-sub : Take the reciprocal of your Y-intercept ( ). Note: A higher Y-intercept means a lower Vmaxcap V sub m a x end-sub Find Kmcap K sub m : Multiply your calculated Vmaxcap V sub m a x end-sub by the slope ( ). Alternatively, look at your X-intercept, which equals