Education
Catalytic Efficiency Calculator (kcat/Km)
kcat/Km in M⁻¹s⁻¹ from direct kcat or from Vmax/[E], with scientific-notation output and bands up to the diffusion-controlled perfection limit. Educational use only.
json· JSON resultOpen tool
Quick start
Call this tool from your code in three languages.
cURL
curl -X POST 'https://api.elysiatools.com/en/api/tools/enzyme-catalytic-efficiency' \
-H 'Content-Type: application/json' \
-d '{"mode":"direct","kcatValue":1000,"kcatUnit":"per-sec","kmValue":100,"kmUnit":"micro","vmaxUMLMin":50,"enzymeUM":2,"decimalPlaces":4}'API reference
Send a POST request with your inputs as JSON. File parameters require a separate upload first.
Endpoint
HTTP
POST https://api.elysiatools.com/en/api/tools/enzyme-catalytic-efficiencyParameters
| Name | Type | Required | Description |
|---|---|---|---|
| mode | select | Yes | Enter kcat directly, or derive it from Vmax and enzyme concentration. |
| kcatValue | number | Yes | Turnover number in the unit selected below (direct mode). |
| kcatUnit | select | Yes | Whether kcat is per second or per minute. |
| kmValue | number | Yes | Michaelis constant in the unit selected below. |
| kmUnit | select | Yes |
MCP integration
Add this tool to your Model Context Protocol server so AI agents can list and call it.
Server configuration
Add this block to your MCP client configuration:
mcp.json
{
"mcpServers": {
"elysiatools-enzyme-catalytic-efficiency": {
"name": "enzyme-catalytic-efficiency",
"description": "kcat/Km in M⁻¹s⁻¹ from direct kcat or from Vmax/[E], with scientific-notation output and bands up to the diffusion-controlled perfection limit. Educational use only.",
"baseUrl": "https://api.elysiatools.com/mcp/sse?toolId=enzyme-catalytic-efficiency",
"command": "",
"args": [],
"env": {},
"isActive": true,
"type": "sse"
}
}
}List available tools
After connecting to the SSE endpoint, list the exposed tools:
tools/list
{
"jsonrpc": "2.0",
"id": 1,
"method": "tools/list"
}Call this tool
Invoke the tool by its id, passing arguments built from its parameters:
tools/call
{
"jsonrpc": "2.0",
"id": 2,
"method": "tools/call",
"params": {
"name": "enzyme-catalytic-efficiency",
"arguments": {
"mode": "direct",
"kcatValue": 1000,
"kcatUnit": "per-sec",
"kmValue": 100,
"kmUnit": "micro",
"vmaxUMLMin": 50,
"enzymeUM": 2,
"decimalPlaces": 4
}
}
}Chain multiple tools in one session with a comma-separated toolId list, e.g. /mcp/sse?toolId=png-to-webp,jpg-to-webp,gif-to-webp (max 20).
Questions or issues? Contact [email protected]