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Default Rate Law Classifications | ||
================================ | ||
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Before the analysis, we classify each rate law into different categories (Xu, 2023). If a rate law does not belong to any of the default classes or the custom classification file provided, a warning will be raised. | ||
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The following categories are used for classifying rate laws: | ||
- **Zeroth order (ZERO)**: No reactant or product in the rate law. | ||
- **Uni-Directional Mass Action (UNDR)**: Direct, one-way reactions where all reactants influencing the rate law and resulting in a single product. | ||
- **Uni-Directional Mass Action with an Activator (UNDR-A)**: Similar to UNDR but includes an essential activator. | ||
- **Irreversible Enzymatic non-Mass Action Rate Law**: Features at least one enzyme and not all reactants in the rate law. | ||
- **Bi-Directional Mass Action (BIDR)**: Covers reversible reactions with all reactants and products in the rate law. | ||
- **Bi-Directional Mass Action with Activator(s) (BIDR-A)**: Reversible reactions with activators, including enzymes different from reactants and products. | ||
- **Reversible Enzymatic non-Mass Action Rate Law**: For reversible reactions where not all reactants or products are in the rate law, including at least one enzyme. | ||
- **Michaelis-Menten (MM)**: Describes enzymatic reactions based on substrate concentration, following specific Michaelis-Menten formulas without explicitly mentioning the enzyme. | ||
- **Michaelis-Menten with explicit enzyme (MMcat)**: Michaelis-Menten model explicitly incorporating the enzyme in the reaction rate equation. | ||
- **Allosteric and Inhibitors**: Michaelis-Menten format affected by allosteric effects or inhibitors, altering reaction rates through enzyme or substrate modulation. | ||
- **Reversible Michaelis-Menten**: Accounts for reaction reversibility in Michaelis-Menten format. | ||
- **Hill Equation**: Describes enzyme kinetics in cooperative binding scenarios, relating reaction rate to substrate concentration through a sigmoidal curve. | ||
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The details of the default rate law classifications can be found in the `source code`_. | ||
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.. _source code: https://github.com/sys-bio/ratesb_python/tree/main/ratesb_python/common |
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Using Custom Rate Law Classifications | ||
===================================== | ||
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`ratesb_python` allows the use of custom rate law classifications. To utilize this, you must create a JSON file defining your rate laws. Each rate law object in the JSON file should include: | ||
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1. **name**: A string that specifies the name of the rate law. | ||
2. **expression**: A valid mathematical equation using specific symbols (compartment, parameter, reactant1, reactant2, reactant3, product1, product2, product3, and enzyme). "species" is NOT allowed, instead you should specify whether a species is reactant, product or enzyme. Any other symbols should not be used in the expression. Mathematical operators such as +, -, *, /, **, and parentheses should be used to construct the equation. | ||
3. **optional_symbols**: An array of symbols not necessarily required in the model's rate law. | ||
4. **power_limited_species**: An array of species where the power (exponent) matters in the analysis. If a species is listed here, it should be raised to a specific power in the rate law (specified in the expression). | ||
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Here's an example of how to define your rate laws in the JSON file: | ||
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.. code-block:: json | ||
[ | ||
{ | ||
"name": "Unidirectional Mass Action with two reactants", | ||
"expression": "compartment * parameter * reactant1 * reactant2**2", | ||
"optional_symbols": ["compartment", "parameter"], | ||
"power_limited_species": ["reactant1,reactant2"] | ||
}, | ||
{ | ||
"name": "Michaelis Menten", | ||
"expression": "compartment * parameter * reactant1 / (reactant1 + parameter)", | ||
"optional_symbols": ["compartment"], | ||
"power_limited_species": ["reactant1"] | ||
}, | ||
{ | ||
"name": "Your own rate law", | ||
"expression": "use: compartment, parameter, reactant1, reactant2, reactant3, product1, product2, product3, enzyme. Do NOT use: species", | ||
"optional_symbols": ["symbols that do not have to include in a rate law"], | ||
"power_limited_species": ["RateSB will pay attention to the power of these species (power matters in this case) symbols that have to be set to a certain power in a rate law (please specify power in the expression)"] | ||
} | ||
] |
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Errors and Warnings | ||
=================== | ||
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`ratesb_python` generates detailed errors and warnings to help you ensure your models are robust and accurate. | ||
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### Errors | ||
- **0001**: No rate law entered | ||
- **0002**: Expecting reactant in rate law but not found | ||
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### Warnings | ||
#### Common Warnings | ||
- **1001**: Rate law contains only number | ||
- **1002**: Unrecognized rate law from the standard list (and the custom list if given) | ||
- **1003**: Flux is not increasing as reactant increases | ||
- **1004**: Flux is not decreasing as product increases | ||
- **1005**: Expecting boundary species reactant in rate law but not found | ||
- **1006**: Expecting parameters to be constants | ||
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#### Reversibility | ||
- **1010**: Irreversible reaction kinetic law contains products | ||
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#### Naming Conventions | ||
- **1020**: We recommend that these parameters start with 'k' | ||
- **1021**: We recommend that these parameters start with 'K' | ||
- **1022**: We recommend that these parameters start with 'V' | ||
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#### Formatting Conventions | ||
- **1030**: Elements of the same type are not ordered properly | ||
- **1031**: Formatting convention not followed (compartment before parameters before species) | ||
- **1032**: Denominator not in alphabetical order | ||
- **1033**: Numerator and denominator not in alphabetical order | ||
- **1034**: Numerator convention not followed and denominator not in alphabetical order | ||
- **1035**: Denominator convention not followed | ||
- **1036**: Numerator not in alphabetical order and denominator convention not followed | ||
- **1037**: Numerator and denominator convention not followed | ||
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#### SBOTerm Annotations | ||
- **1040**: Uni-directional mass action annotation not following recommended SBO terms | ||
- **1041**: Uni-term with the moderator annotation not following recommended SBO terms | ||
- **1042**: Bi-directional mass action or Bi-terms with the moderator annotation not following recommended SBO terms | ||
- **1043**: Michaelis-Menten kinetics without an explicit enzyme annotation not following recommended SBO terms | ||
- **1044**: Michaelis-Menten kinetics with an explicit enzyme annotation not following recommended SBO terms | ||
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For more details about warnings and errors, please refer to "View Error Codes" button in `RateSB`_. | ||
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.. _RateSB: https://sys-bio.github.io/ratesb/ |
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Installation | ||
============ | ||
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To install `ratesb_python`, execute the following command in your terminal: | ||
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.. code-block:: bash | ||
pip install ratesb_python |
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Quick Start Guide | ||
================= | ||
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This guide provides a quick introduction to using `ratesb_python`. | ||
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Installation | ||
------------ | ||
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To install `ratesb_python`, execute the following command in your terminal: | ||
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.. code-block:: bash | ||
pip install ratesb_python | ||
Basic Usage | ||
----------- | ||
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Here's a simple example of how to use `ratesb_python`: | ||
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.. code-block:: python | ||
from ratesb_python import check_model | ||
print(check_model("S->P;k1*S")) | ||
For more detailed usage examples, refer to the :ref:`usage` section. |
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Usage | ||
===== | ||
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This section provides detailed usage examples for `ratesb_python`. | ||
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Simple Example | ||
-------------- | ||
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Here’s a simple example of using `ratesb_python`: | ||
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.. code-block:: python | ||
from ratesb_python import check_model | ||
print(check_model("S->P;k1*S")) | ||
Complex Example | ||
--------------- | ||
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For more complex use cases, follow the example below: | ||
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.. code-block:: python | ||
from ratesb_python import Analyzer | ||
# Assuming `model` is your SBML or Antimony model | ||
analyzer = Analyzer("path/to/model.xml", "path/to/custom_classifications.json") | ||
# or: | ||
analyzer2 = Analyzer("S1->P1; k1 * S1") # custom classification file is optional | ||
# Analyze the model for rate law correctness | ||
analyzer.check_all() | ||
results = analyzer.results | ||
# Display all errors and warnings | ||
print(results) | ||
# Check selected errors and warnings | ||
analyzer.checks([1, 2, 1001, 1002]) | ||
# No need to set results = analyzer.results again as results updates automatically | ||
print(results) | ||
# Display only warnings | ||
warnings = results.get_warnings() | ||
for reaction, messages in warnings.items(): | ||
print(reaction, messages) | ||
# Retrieve messages for a specific reaction | ||
messages = results.get_messages_by_reaction("Reaction1") | ||
print(messages) | ||
# Remove messages for a specific reaction | ||
results.remove_messages_by_reaction("Reaction1") | ||
# Get number of errors and warnings | ||
print("Num Errors: ", results.count_errors()) | ||
print("Num Warnings: ", results.count_warnings()) |